Mark Shaffer, MD
NPI 1295836674 · Internal Medicine Physician · Bayside, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Shaffer, MD is a Internal Medicine Physician provider in Bayside, NY (NPI 1295836674).
Provider details
- NPI number
- 1295836674
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 136330 (NY)
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
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
108 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 | 94 | $102 |
| Administration of Influenza Virus VaccineG0008 | 14 | $36 |
Typical Medicare-allowed amounts for these services range $36–$102 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 55 | 19 |
| Ergocalciferol (vitamin D2)brand: Vitamin D2 | 23 | — |
| Valsartan | 20 | — |
| Amlodipine Besylate | 20 | — |
| Sitagliptin Phosphatebrand: Januvia | 19 | — |
| Metformin Hcl | 16 | — |
| Allopurinol | 16 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Shaffer's NPI number?
- Mark Shaffer's National Provider Identifier (NPI) is 1295836674, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Shaffer's specialty?
- Mark Shaffer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Shaffer located?
- Mark Shaffer's practice location on file with NPPES is 69-36a 215 Street, Bayside, NY 11364.
- What is Mark Shaffer's phone number?
- The practice phone number listed in the NPPES registry for Mark Shaffer is (718) 279-8787.
- Does Mark Shaffer accept Medicare?
- Mark Shaffer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Shaffer's NPI active?
- Yes — Mark Shaffer's NPI (1295836674) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.