Today you will find The BCBS Alpha Numeric Prefix List from G2A to G9Z. The alpha Numeric prefix is very important to the identification number. The prefix acts as a key element in confirming the members’ eligibility and coverage information. Prefixes are also used to identify and correctly route claims to the appropriate Blue Cross Blue Shield Plan for processing.
Most members with coverage through a Blue Cross Blue Shield Plan are assigned a Three Letter alpha prefix as a part of their unique identification number. The alpha prefix can easily be identified as it is the first three characters.

S.No | Prefix | BCBS Company Name |
---|---|---|
1 | G2A | Regence Blue Cross Blue Shield |
2 | G2B | Blue Cross Blue Shield of Western New York |
3 | G2C | Blue Cross Blue Shield of Rhode Island |
4 | G2D | Anthem Blue Cross Blue Shield of Colorado |
5 | G2E | Blue Cross Blue Shield of Illinois |
6 | G2F | Blue Cross Blue Shield of Illinois |
7 | G2G | Anthem Blue Cross Blue Shield of Virginia |
8 | G2H | Highmark Blue Shield |
9 | G2I | Unassigned Prefix |
10 | G2J | Blue Cross Blue Shield of Texas |
11 | G2K | Blue Cross Blue Shield of Illinois |
12 | G2L | Anthem Blue Cross of California |
13 | G2M | Anthem Blue Cross Blue Shield of Virginia |
14 | G2N | Independence Blue Cross |
15 | G2O | Unassigned Prefix |
16 | G2P | Regence Blue Cross Blue Shield |
17 | G2Q | Anthem Blue Cross of California |
18 | G2R | Blue Cross Blue Shield of Illinois |
19 | G2S | Anthem Blue Cross of California |
20 | G2T | Independence Blue Cross |
21 | G2U | Anthem Blue Cross of California |
22 | G2V | Independence Blue Cross |
23 | G2W | Blue Cross Blue Shield of Illinois |
24 | G2X | Blue Cross Blue Shield of Texas |
25 | G2Y | Anthem Blue Cross Blue Shield of Connecticut |
26 | G2Z | Anthem Blue Cross of California |
27 | G3A | Regence Blue Cross Blue Shield |
28 | G3B | Highmark Blue Cross Blue Shield |
29 | G3C | Regence Blue Cross Blue Shield |
30 | G3D | Highmark Blue Cross Blue Shield |
31 | G3E | Highmark Blue Cross Blue Shield |
32 | G3F | Anthem Blue Cross Blue Shield of Virginia |
33 | G3G | Anthem Blue Cross Blue Shield of Missouri |
34 | G3H | Blue Cross Blue Shield of Texas |
35 | G3I | Anthem Blue Cross of California |
36 | G3J | Anthem Blue Cross Blue Shield of Virginia |
37 | G3K | Blue Cross Blue Shield of Minnesota |
38 | G3L | Blue Cross Blue Shield of Illinois |
39 | G3M | Anthem Blue Cross Blue Shield of Virginia |
40 | G3N | Anthem Blue Cross Blue Shield of Virginia |
41 | G3O | Unassigned Prefix |
42 | G3P | Anthem Blue Cross Blue Shield of Virginia |
43 | G3Q | Anthem Blue Cross Blue Shield of Georgia |
44 | G3R | Regence Blue Cross Blue Shield |
45 | G3S | Anthem Blue Cross of California |
46 | G3T | Blue Shield of Northeastern New York |
47 | G3U | Blue Cross Blue Shield of Michigan |
48 | G3V | Regence Blue Cross Blue Shield |
49 | G3W | Anthem Blue Cross Blue Shield of Virginia |
50 | G3X | Blue Cross Blue Shield of Michigan |
51 | G3Y | Horizon Blue Cross Blue Shield |
52 | G3Z | Anthem Blue Cross Blue Shield of Virginia |
53 | G4A | Unassigned Prefix |
54 | G4B | Anthem Blue Cross Blue Shield of Indiana |
55 | G4C | Blue Cross Blue Shield of Illinois |
56 | G4D | Anthem Blue Cross Blue Shield of Georgia |
57 | G4E | Anthem Blue Cross Blue Shield of Indiana |
58 | G4F | Regence Blue Cross Blue Shield |
59 | G4G | Anthem Blue Cross Blue Shield of Georgia |
60 | G4H | Blue Cross Blue Shield of Texas |
61 | G4I | Unassigned Prefix |
62 | G4J | Anthem Blue Cross Blue Shield of Indiana |
63 | G4K | Anthem Blue Cross Blue Shield of Virginia |
64 | G4L | Anthem Blue Cross Blue Shield of Indiana |
65 | G4M | Carefirst Blue Cross Blue Shield |
66 | G4N | Anthem Blue Cross Blue Shield of Virginia |
67 | G4O | Unassigned Prefix |
68 | G4P | Anthem Blue Cross Blue Shield of Georgia |
69 | G4Q | Anthem Blue Cross Blue Shield of Indiana |
70 | G4R | Anthem Blue Cross Blue Shield of Indiana |
71 | G4S | Anthem Blue Cross Blue Shield of Indiana |
72 | G4T | Blue Cross Blue Shield of Illinois |
73 | G4U | Anthem Blue Cross Blue Shield of Indiana |
74 | G4V | Anthem Blue Cross Blue Shield of Georgia |
75 | G4W | Unassigned Prefix |
76 | G4X | Anthem Blue Cross Blue Shield of Indiana |
77 | G4Y | Anthem Blue Cross Blue Shield of Georgia |
78 | G4Z | Anthem Blue Cross Blue Shield of Indiana |
79 | G5A | Blue Cross Blue Shield of Minnesota |
80 | G5B | Anthem Blue Cross Blue Shield of Ohio |
81 | G5C | Blue Cross Blue Shield of Texas |
82 | G5D | Blue Cross Blue Shield of Texas |
83 | G5E | Blue Cross Blue Shield of Texas |
84 | G5F | Blue Cross Blue Shield of Texas |
85 | G5G | Blue Cross Blue Shield of Texas |
86 | G5H | Blue Cross Blue Shield of Texas |
87 | G5I | Unassigned Prefix |
88 | G5J | Blue Cross Blue Shield of Illinois |
89 | G5K | Blue Cross Blue Shield of Texas |
90 | G5L | Highmark Blue Cross Blue Shield |
91 | G5M | Blue Cross Blue Shield of Texas |
92 | G5N | Blue Cross Blue Shield of Western New York |
93 | G5O | Unassigned Prefix |
94 | G5P | Anthem Blue Cross Blue Shield of Indiana |
95 | G5Q | Anthem Blue Cross Blue Shield of Georgia |
96 | G5R | Blue Cross Blue Shield of Massachusetts |
97 | G5S | Anthem Blue Cross of California |
98 | G5T | Blue Cross Blue Shield of Illinois |
99 | G5U | Unassigned Prefix |
100 | G5V | Anthem Blue Cross Blue Shield of Georgia |
101 | G5W | Unassigned Prefix |
102 | G5X | Anthem Blue Cross Blue Shield of Virginia |
103 | G5Y | Unassigned Prefix |
104 | G5Z | Carefirst Blue Cross Blue Shield |
105 | G6A | Anthem Blue Cross Blue Shield of Virginia |
106 | G6B | Anthem Blue Cross Blue Shield of Georgia |
107 | G6C | Anthem Blue Cross Blue Shield of Virginia |
108 | G6D | Highmark Blue Cross Blue Shield |
109 | G6E | Empire Blue Cross Blue Shield |
110 | G6F | Regence Blue Cross Blue Shield |
111 | G6G | Anthem Blue Cross Blue Shield of Wisconsin |
112 | G6H | Blue Cross Blue Shield of Texas |
113 | G6I | Unassigned Prefix |
114 | G6J | Unassigned Prefix |
115 | G6K | Blue Cross Blue Shield of Illinois |
116 | G6L | Regence Blue Cross Blue Shield |
117 | G6M | Anthem Blue Cross Blue Shield of Georgia |
118 | G6N | Anthem Blue Cross Blue Shield of Virginia |
119 | G6O | Unassigned Prefix |
120 | G6P | Anthem Blue Cross of California |
121 | G6Q | Anthem Blue Cross Blue Shield of Georgia |
122 | G6R | Blue Cross Blue Shield of Illinois |
123 | G6S | Anthem Blue Cross Blue Shield of Indiana |
124 | G6T | Blue Cross Blue Shield of Illinois |
125 | G6U | Unassigned Prefix |
126 | G6V | Unassigned Prefix |
127 | G6W | Horizon Blue Cross Blue Shield |
128 | G6X | Unassigned Prefix |
129 | G6Y | Unassigned Prefix |
130 | G6Z | Unassigned Prefix |
131 | G7A | Blue Cross of Massachusetts |
132 | G7B | Carefirst Blue Cross Blue Shield |
133 | G7C | Anthem Blue Cross Blue Shield of Virginia |
134 | G7D | Highmark Blue Cross Blue Shield |
135 | G7E | Regence Blue Cross Blue Shield |
136 | G7F | Anthem Blue Cross Blue Shield of Georgia |
137 | G7G | Unassigned Prefix |
138 | G7H | Blue Cross Blue Shield of Texas |
139 | G7I | Unassigned Prefix |
140 | G7J | Unassigned Prefix |
141 | G7K | Unassigned Prefix |
142 | G7L | Unassigned Prefix |
143 | G7M | Regence Blue Cross Blue Shield |
144 | G7N | Unassigned Prefix |
145 | G7O | Unassigned Prefix |
146 | G7P | Blue Cross Blue Shield of Western New York |
147 | G7Q | Unassigned Prefix |
148 | G7R | Highmark Blue Cross Blue Shield |
149 | G7S | Anthem Blue Cross Blue Shield of Indiana |
150 | G7T | Blue Cross Blue Shield of Illinois |
151 | G7U | Unassigned Prefix |
152 | G7V | Unassigned Prefix |
153 | G7W | Anthem Blue Cross of California |
154 | G7X | Unassigned Prefix |
155 | G7Y | Unassigned Prefix |
156 | G7Z | Unassigned Prefix |
157 | G8A | Anthem Blue Cross Blue Shield of Colorado |
158 | G8B | Anthem Blue Cross of California |
159 | G8C | Blue Cross Blue Shield of Illinois |
160 | G8D | Unassigned Prefix |
161 | G8E | Unassigned Prefix |
162 | G8F | Blue Cross Blue Shield of Montana |
163 | G8G | Anthem Blue Cross Blue Shield of Georgia |
164 | G8H | Blue Cross Blue Shield of Texas |
165 | G8I | Unassigned Prefix |
166 | G8J | Unassigned Prefix |
167 | G8K | Unassigned Prefix |
168 | G8L | Unassigned Prefix |
169 | G8M | Blue Cross Blue Shield of Texas |
170 | G8N | Unassigned Prefix |
171 | G8O | Unassigned Prefix |
172 | G8P | Anthem Blue Cross Blue Shield of Georgia |
173 | G8Q | Unassigned Prefix |
174 | G8R | Anthem Blue Cross Blue Shield of Georgia |
175 | G8S | Blue Cross Blue Shield of Illinois |
176 | G8T | Blue Cross Blue Shield of Illinois |
177 | G8U | Regence Blue Cross Blue Shield |
178 | G8V | Unassigned Prefix |
179 | G8W | Unassigned Prefix |
180 | G8X | Unassigned Prefix |
181 | G8Y | Unassigned Prefix |
182 | G8Z | Unassigned Prefix |
183 | G9A | Blue Cross Blue Shield of Minnesota |
184 | G9B | Anthem Blue Cross Blue Shield of Georgia |
185 | G9C | Anthem Blue Cross Blue Shield of Missouri |
186 | G9D | Unassigned Prefix |
187 | G9E | Unassigned Prefix |
188 | G9F | Anthem Blue Cross of California |
189 | G9G | Anthem Blue Cross of California |
190 | G9H | Anthem Blue Cross Blue Shield of Virginia |
191 | G9I | Unassigned Prefix |
192 | G9J | Unassigned Prefix |
193 | G9K | Unassigned Prefix |
194 | G9L | Unassigned Prefix |
195 | G9M | Blue Cross Blue Shield of Massachusetts |
196 | G9N | Empire Blue Cross Blue Shield |
197 | G9O | Unassigned Prefix |
198 | G9P | Premera Blue Cross Blue Shield of Alaska |
199 | G9Q | Unassigned Prefix |
200 | G9R | Anthem Blue Cross of California |
201 | G9S | Unassigned Prefix |
202 | G9T | Anthem Blue Cross Blue Shield of Virginia |
203 | G9U | Unassigned Prefix |
204 | G9V | Unassigned Prefix |
205 | G9W | Anthem Blue Cross of California |
206 | G9X | Anthem Blue Cross of California |
207 | G9Y | Unassigned Prefix |
208 | G9Z | Unassigned Prefix |
- Do not omit or randomly select an alpha prefix.
- Do not substitute another Blue Cross Blue Shield Member’s prefix.
- Include the alpha prefix and all alpha numeric characters preceding the alpha prefix on all correspondence and claims submitted to Blue Cross Blue Shield of Texas.
- The alpha prefix is always three letters followed by the member’s ID number which can be from 6 up to 14 characters total.
- If possible, make copies of the member’s ID card (front and back) for your records.
- We recommend that you obtain a copy of the ID card any time there has been a coverage or policy change. If there are no changes, we suggest that you obtain card copies annually.
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