Rory Marks, MD
NPI 1578648184 · Rheumatology Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rory Marks, MD is a Rheumatology Physician provider in Ann Arbor, MI (NPI 1578648184).
Provider details
- NPI number
- 1578648184
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301500082 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
70 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) |
|---|---|---|
| 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 | 29 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 26 | $98 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 15 | $164 |
Typical Medicare-allowed amounts for these services range $17–$164 (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 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 60 | 16 |
| Tocilizumabbrand: Actemra Actpen | 34 | — |
| Hydroxychloroquine Sulfate | 33 | 12 |
| Methotrexate Sodiumbrand: Methotrexate | 30 | — |
| Tofacitinib Citratebrand: Xeljanz Xr | 24 | — |
| Etanerceptbrand: Enbrel Sureclick | 22 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-25
- Last updated
- 2019-10-18
Frequently asked questions
- What is Rory Marks's NPI number?
- Rory Marks's National Provider Identifier (NPI) is 1578648184, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rory Marks's specialty?
- Rory Marks is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Rory Marks located?
- Rory Marks's practice location on file with NPPES is 1500 E Medical Center Dr, Ann Arbor, MI 48109-5000.
- What is Rory Marks's phone number?
- The practice phone number listed in the NPPES registry for Rory Marks is (734) 936-4000.
- Does Rory Marks accept Medicare?
- Rory Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rory Marks's NPI active?
- Yes — Rory Marks's NPI (1578648184) is active in the NPPES registry as of the last update on 2019-10-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.