John G Grantham, M.D.
John G Grantham is a Diagnostic Radiology Physician provider (Radiology) practicing in Boulder, CO, registered in the NPPES registry with NPI 1992789614 since 2005. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1992789614 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | John G Grantham |
| Credential | M.D. |
| Sex | Male |
| Practice address | 2750 BROADWAY ST, Boulder, CO, 80304 |
| Phone | 3034403000 |
| Enumeration date | 2005-12-06 |
| Last updated in NPPES | 2012-10-31 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 2085R0202X | Diagnostic Radiology Physician | Primary | 26497 | CO |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: John Grantham, M.D. NPI: 1992789614 Taxonomy: 2085R0202X (Diagnostic Radiology Physician) Address: 2750 BROADWAY ST, Boulder, CO, 80304
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1275537078 | Emma Mccarty | Individual | Internal Medicine Physician | Boulder, CO |
| 1457358228 | Lee Brennan | Individual | Physical Therapist | Boulder, CO |
| 1205836889 | Larry Munch | Individual | Urology Physician | Boulder, CO |
| 1316948797 | Barry Migicovsky | Individual | Gastroenterology Physician | Boulder, CO |
| 1821082819 | Paula Mendes | Individual | Neurology Physician | Boulder, CO |
| 1750365565 | Karen Andrews | Individual | Allergy Physician | Boulder, CO |
| 1750365417 | Jennifer Christensen | Individual | Internal Medicine Physician | Boulder, CO |
| 1356325013 | Coco Dughi | Individual | Internal Medicine Physician | Boulder, CO |
Verify this record
Cross-check NPI 1992789614 against the authoritative CMS record: view John G Grantham on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2012-10-31.