John Marcelis, MD
NPI 1285667105 · Geriatric Medicine (Internal Medicine) Physician · Warminster, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Marcelis, MD is a Geriatric Medicine (Internal Medicine) Physician provider in Warminster, PA (NPI 1285667105).
Provider details
- NPI number
- 1285667105
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- NJDCATEMP-025750 (NJ)
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,084 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) |
|---|---|---|
| Admn Sarscov2 Vacc 1 Dose90480 | 226 | $39 |
| Administration of Influenza Virus VaccineG0008 | 179 | $32 |
| 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 | 174 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 155 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 106 | $118 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
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 |
|---|---|---|
| Warfarin Sodium | 122 | — |
| Levothyroxine Sodium | 104 | 29 |
| Atorvastatin Calcium | 95 | 31 |
| Amlodipine Besylate | 73 | 22 |
| Pantoprazole Sodium | 70 | 18 |
| Gabapentin | 70 | 15 |
| Lisinopril |
Practice location
Mailing address
Additional practice locations (2)
- 3000 Essex RdTinton Falls, NJ 07753-2400Phone: (732) 643-2070Fax: (732) 643-2015
- 14703 Eagle Vista DrHouston, TX 77077-5394Phone: (281) 249-7100Fax: (281) 249-7365
Registry dates
- Enumerated
- 2006-07-07
- Last updated
- 2026-02-26
- Certified
- 2026-02-26
Frequently asked questions
- What is John Marcelis's NPI number?
- John Marcelis's National Provider Identifier (NPI) is 1285667105, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Marcelis's specialty?
- John Marcelis is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is John Marcelis located?
- John Marcelis's practice location on file with NPPES is 10000 Anns Choice Way, Warminster, PA 18974-3527.
- What is John Marcelis's phone number?
- The practice phone number listed in the NPPES registry for John Marcelis is (215) 443-3850.
- Does John Marcelis accept Medicare?
- John Marcelis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Marcelis's NPI active?
- Yes — John Marcelis's NPI (1285667105) is active in the NPPES registry as of the last update on 2026-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.