Susan Ritter, MD, PHD
NPI 1811042245 · Rheumatology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Susan Ritter, MD, PHD is a Rheumatology Physician provider in Boston, MA (NPI 1811042245).
Provider details
- NPI number
- 1811042245
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Female
- Sole proprietor
- No
- License
- 224627 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
669 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 | 316 | $101 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 202 | $138 |
| 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 | 49 | $17 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 46 | $139 |
| 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 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 345 | 98 |
| Prednisone | 304 | 84 |
| Methotrexate Sodiumbrand: Methotrexate | 298 | 91 |
| Adalimumabbrand: Humira(cf) Pen | 116 | 13 |
| Etanerceptbrand: Enbrel Sureclick | 110 | 12 |
| Leflunomide | 85 | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-24
- Last updated
- 2012-05-03
Frequently asked questions
- What is Susan Ritter's NPI number?
- Susan Ritter's National Provider Identifier (NPI) is 1811042245, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Susan Ritter's specialty?
- Susan Ritter is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Susan Ritter located?
- Susan Ritter's practice location on file with NPPES is 75 Francis St, Boston, MA 02115-6110.
- What is Susan Ritter's phone number?
- The practice phone number listed in the NPPES registry for Susan Ritter is (617) 732-5325.
- Does Susan Ritter accept Medicare?
- Susan Ritter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Susan Ritter's NPI active?
- Yes — Susan Ritter's NPI (1811042245) is active in the NPPES registry as of the last update on 2012-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.