JOHN MARCELIS MD
NPI 1285667105
Internal Medicine - Geriatric Medicine in Warminster, PA

Q: What is John Marcelis's NPI number?

The NPI number for John Marcelis is 1285667105. It was assigned to this individual provider in the NPPES registry on July 7, 2006.

Q: What is John Marcelis's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Q: When was this NPI record last updated?

The NPPES record for John Marcelis was last updated on February 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 07, 2006PECOS EnrolledAccepts Medicare Assignment

10000 ANNS CHOICE WAY, WARMINSTER, PA 18974(215) 443-3850(215) 443-3963 Get Directions Write a Review

NPPES record last updated: February 26, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 2, 2022, Oct 14, 2020, Oct 2, 2020 (3 updates tracked since 2020).

On this page

About John Marcelis Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN MARCELIS MD (NPI 1285667105) is an individual geriatric medicine provider in Warminster, Pennsylvania, licensed in Pennsylvania (MD045170E) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Temple University School Of Medicine (1987).

NPPES Registry Identity

NPI1285667105

Entity TypeIndividualMale

Primary Taxonomy207RG0300X

Provider Legal NameJOHN MARCELISCredential: MD

Location Address10000 ANNS CHOICE WAYWarminster, PA 18974-3527

Mailing Address5730 Executive Dr Ste 230Catonsville, MD 21228-1762 · (215) 443-3850 · Fax (215) 443-3963

Phone(215) 443-3850

Fax(215) 443-3963

Sole ProprietorNo

Medical School CMSTemple University School Of MedicineGraduated 1987

Enumeration DateJuly 7, 2006

Last NPPES UpdateFebruary 26, 20263 updates tracked since enumeration

NPPES CertifiedFebruary 26, 2026

✔ NPI 1285667105 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RG0300X

Licenses✔ Licensed in PA · MD045170E✔ Licensed in NJ · NJDCATEMP-025750

Definition

An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.

Also ListedInternal MedicineTaxonomy 207R00000X · License MD045170E (PA)

10000 ANNS CHOICE WAY, Warminster, PA 18974

Open in Google Maps ↗

Secondary Practice Locations 2

Location 114703 Eagle Vista DrHouston, TX 77077-5394 · Phone (281) 249-7100 · Fax (281) 249-7365

Location 23000 Essex RdTinton Falls, NJ 07753-2400 · Phone (732) 643-2070 · Fax (732) 643-2015

Other Identifiers 4

Other0409465Evercare

Other0417057000PA · Keystone Mco

Other594706Highmark Bcbs

OtherSE1562914PA · Highmark Ble Shield

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

John Marcelis Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4082753355

PECOS Enrollment IDI20091125000428

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show John Marcelis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Erickson Health Medical Group Of Pennsylvania PC

0.3 mi

Internal Medicine

10000 ANNS CHOICE WAY
Warminster, PA 18974

Reassigned Medicare billing, Pennsylvania enrollment
20 clinicians in this Medicare group

NPI 1114947991 (215) 443-3850

Erickson Health Medical Group Of Texas PA

1,366 mi

Internal Medicine

14703 EAGLE VISTA DR
Houston, TX 77077

Reassigned Medicare billing, Texas enrollment
15 clinicians in this Medicare group

NPI 1285654079 (281) 249-7100

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Influenza vaccine split virus, preservative free 90662

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

179 services179 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

179 services179 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

155 services55 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

106 services42 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

61 services36 patients

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

41 services15 patients

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes 99307

A follow-up nursing facility visit per day typically lasts about 10 minutes. This service involves a healthcare professional checking on your health status, answering any questions you may have, and monitoring your progress. This routine check ensures your recovery is on track and any concerns are addressed promptly.

28 services20 patients

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

28 services26 patients

Annual alcohol misuse screening, 5 to 15 minutes G0442

An annual alcohol misuse screening is a 15-minute check-up to assess your drinking habits. It helps identify if you're consuming alcohol in a way that could harm your health. This is not a judgment, but a tool to promote your wellbeing.

27 services27 patients

Annual depression screening, 5 to 15 minutes G0444

An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.

25 services25 patients

Administration of pneumococcal, influenza, hepatitis b, and/or covid-19 vaccine inside a patient's home; reported only once per individual home per date of service when such vaccine administration(s) are performed at the patient's home M0201

The Covid-19 vaccine can be administered at your home for convenience and safety. This service is reported once per home, per date, when only the vaccine is given. It's a straightforward process where a medical professional visits your home to give the vaccine.

19 services18 patients

Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen 87635

This is a lab test that detects the presence of COVID-19 in your body. It uses a technique to amplify the virus's genetic material, either DNA or RNA, making it easier to identify. A positive result indicates an active infection.

15 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 18974 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$180.99 typical visit price

range $59.88 – $180.99

Typical copayment $45.24 (range $14.97 – $45.24)

Most-billed visit code 99205

Established Patient

$105.21 typical visit price

range $19.30 – $147.29

Typical copayment $26.30 (range $4.82 – $36.82)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. LISA ANNE WESCOTT MSN, CRNP

Nurse Practitioner (Adult Health)