Thomas Pfeiffer, M.D.
NPI 1528323805 · Internal Medicine Physician · Cambridge, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Pfeiffer, M.D. is a Internal Medicine Physician provider in Cambridge, MA (NPI 1528323805).
Provider details
- NPI number
- 1528323805
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 253018 (MA)
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
13 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
296 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 | 84 | $83 |
| 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 | 48 | $18 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 42 | $84 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 38 | $68 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 29 | $94 |
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 | 248 | 76 |
| Gabapentin | 130 | 31 |
| Lisinopril | 105 | 28 |
| Amlodipine Besylate | 100 | 34 |
| Metoprolol Succinate | 98 | 29 |
| Metformin Hclbrand: Metformin Hcl Er | 80 | 22 |
| Valsartan |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-07-12
- Last updated
- 2016-02-26
Frequently asked questions
- What is Thomas Pfeiffer's NPI number?
- Thomas Pfeiffer's National Provider Identifier (NPI) is 1528323805, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Pfeiffer's specialty?
- Thomas Pfeiffer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Pfeiffer located?
- Thomas Pfeiffer's practice location on file with NPPES is 1493 Cambridge St, Cambridge, MA 02139-1047.
- What is Thomas Pfeiffer's phone number?
- The practice phone number listed in the NPPES registry for Thomas Pfeiffer is (617) 665-1000.
- Does Thomas Pfeiffer accept Medicare?
- Thomas Pfeiffer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Pfeiffer's NPI active?
- Yes — Thomas Pfeiffer's NPI (1528323805) is active in the NPPES registry as of the last update on 2016-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.