Physician Profile
Unclaimed ProfileAbout MARCELIS
John Marcelis, MD practises internal medicine in Warminster, PA. John is a 1987 graduate of Temple University School of Medicine. John is also listed as specialising in geriatric medicine. Medicare claims data shows John provided 1,489 services to 1,049 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. Marcelis?
Dr. Marcelis is an internal medicine in Warminster, PA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
What is Dr. Marcelis's address?
Dr. Marcelis is listed at 10000 ANNS CHOICE WAY, Warminster, PA 18974. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Marcelis?
The number on file is (215) 443-3850. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Marcelis?
Dr. Marcelis's National Provider Identifier is 1285667105. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Marcelis train?
Dr. Marcelis attended Temple University School of Medicine, graduating in 1987. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Marcelis have?
Dr. Marcelis has 39 years experience. Calculated from a graduation year of 1987, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Marcelis perform?
According to Medicare billing data, Dr. Marcelis performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as sarscv2 vac 30mcg trs-suc im and admn sarscov2 vacc 1 dose, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Marcelis's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Marcelis. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (215) 443-3850
- Email not available
Practice Locations
10000 ANNS CHOICE WAY
Warminster, PA 18974
Procedures Most Often Billed to Medicare
1,489 services · 1,049 patients · 15 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
155 |
| Sarscv2 vac 30mcg trs-suc im | Treatment | 91320 |
226 |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
226 |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
179 |
| Administration of influenza virus vaccine | Billing code | G0008 |
179 |
| 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' | Billing code | G2211 |
174 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
106 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
61 |
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
41 |
| Advance care planning, first 30 minutes | Office visit | 99497 |
28 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 29 related providers in 4 groups
Other internal medicines in Warminster 5
Same specialty, same city.
Trained at Temple University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1987 at Temple University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in PA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.