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MR. MARCUS SAMUEL MERMELSTEIN PA-C
NPI 1629463898
Physician Assistant in Bethesda, MD

Active since April 03, 2015PECOS Enrolled
8901 WISCONSIN AVE BLDG 9A FL 3, SURGICAL ICU, BETHESDA, MD 20889(301) 400-0018 Get Directions Write a Review

NPPES record last updated: May 6, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mr. Marcus Samuel Mermelstein Pa-c NPPES

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

MR. MARCUS SAMUEL MERMELSTEIN PA-C (NPI 1629463898) is an individual physician assistant in Bethesda, Maryland, licensed in Maryland (C0007408) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS and is a graduate of Other (2015).

NPPES Registry Identity

NPI1629463898
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMR. MARCUS SAMUEL MERMELSTEINCredential: PA-C
Location Address8901 WISCONSIN AVE BLDG 9A FL 3, SURGICAL ICUBethesda, MD 20889-5367
Mailing Address8901 Wisconsin Ave Bldg 9a Fl 3, Surgical IcuBethesda, MD 20889-0001 · (301) 400-0018
Phone(301) 400-0018
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateApril 3, 2015
Last NPPES UpdateMay 6, 2025
NPPES CertifiedMay 6, 2025
✔ NPI 1629463898 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in MD · C0007408
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
8901 WISCONSIN AVE BLDG 9A FL 3, SURGICAL ICU, Bethesda, MD 20889
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mr. Marcus Samuel Mermelstein Pa-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8325345390
PECOS Enrollment IDI20260310001607
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20889 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
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$80.66 typical visit price
range $21.40 – $158.88
Typical copayment $20.16 (range $5.35 – $39.72)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marcus Mermelstein's NPI number?

The NPI number for Marcus Mermelstein is 1629463898. It was assigned to this individual provider in the NPPES registry on April 3, 2015.

Where is Marcus Mermelstein located?

Marcus Mermelstein practices at 8901 Wisconsin Ave Bldg 9A Fl 3, Surgical Icu, Bethesda, MD 20889. The listed phone number is (301) 400-0018.

What is Marcus Mermelstein's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Marcus Mermelstein enrolled in Medicare?

Yes. Marcus Mermelstein is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Marcus Mermelstein was last updated on May 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.