Allison Ruff, MD
NPI 1437448057 · Internal Medicine Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison Ruff, MD is a Internal Medicine Physician provider in Ann Arbor, MI (NPI 1437448057).
Provider details
- NPI number
- 1437448057
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
289 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 104 | $66 |
| 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 | 69 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 60 | $130 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 56 | $98 |
Typical Medicare-allowed amounts for these services range $16–$130 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 106 | 42 |
| Levothyroxine Sodium | 85 | 26 |
| Hydrochlorothiazide | 72 | 19 |
| Simvastatin | 63 | 14 |
| Losartan Potassium | 62 | 18 |
| Amlodipine Besylate | 58 | 22 |
| Omeprazole | 54 |
Practice location
Mailing address
Additional practice locations (1)
- 1500 E Medical Center Dr3rd Floor Taubman Center Recp BAnn Arbor, MI 48109-5352Phone: (734) 936-5582
Registry dates
- Enumerated
- 2011-04-04
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Allison Ruff's NPI number?
- Allison Ruff's National Provider Identifier (NPI) is 1437448057, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Ruff's specialty?
- Allison Ruff is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Allison Ruff located?
- Allison Ruff's practice location on file with NPPES is 1500 E Medical Center Dr, Ann Arbor, MI 48109-5000.
- What is Allison Ruff's phone number?
- The practice phone number listed in the NPPES registry for Allison Ruff is (734) 647-5299.
- Does Allison Ruff accept Medicare?
- Allison Ruff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison Ruff's NPI active?
- Yes — Allison Ruff's NPI (1437448057) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.