Martha Gray, MD
NPI 1801892294 · Internal Medicine Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martha Gray, MD is a Internal Medicine Physician provider in Ann Arbor, MI (NPI 1801892294).
Provider details
- NPI number
- 1801892294
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301043873 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,474 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 444 | $90 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 236 | $50 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 199 | $16 |
| Hemoglobin A1c Level83036 | 163 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 154 | $73 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 129 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 897 | 249 |
| Levothyroxine Sodium | 662 | 165 |
| Amlodipine Besylate | 661 | 184 |
| Lisinopril | 629 | 170 |
| Losartan Potassium | 554 | 156 |
| Hydrochlorothiazide | 506 | 140 |
| Simvastatin | 390 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-22
- Last updated
- 2021-06-14
- Certified
- 2021-06-14
Frequently asked questions
- What is Martha Gray's NPI number?
- Martha Gray's National Provider Identifier (NPI) is 1801892294, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martha Gray's specialty?
- Martha Gray is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Martha Gray located?
- Martha Gray's practice location on file with NPPES is 2200 Green Rd, Ann Arbor, MI 48105.
- What is Martha Gray's phone number?
- The practice phone number listed in the NPPES registry for Martha Gray is (734) 994-7446.
- Does Martha Gray accept Medicare?
- Martha Gray is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Martha Gray's NPI active?
- Yes — Martha Gray's NPI (1801892294) is active in the NPPES registry as of the last update on 2021-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.