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DR. REBECCA WONG GREGG MD, MPH
NPI 1386278984
Obstetrics & Gynecology in Bethesda, MD

Active since February 24, 2020PECOS Enrolled
8901 ROCKVILLE PIKE, BETHESDA, MD 20889(301) 400-2140 Get Directions Write a Review

NPPES record last updated: September 3, 2025. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Sep 3, 2025, Sep 26, 2024, Aug 8, 2022 and 3 more (6 updates tracked since 2020).

About Dr. Rebecca Wong Gregg Md, Mph NPPES

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

DR. REBECCA WONG GREGG MD, MPH (NPI 1386278984) is an individual obstetrics & gynecology provider in Bethesda, Maryland, licensed in Virginia (0101273866) and active in the NPI registry since February 2020. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1386278984
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. REBECCA WONG GREGGCredential: MD, MPH
Location Address8901 ROCKVILLE PIKEBethesda, MD 20889-0001
Mailing Address8901 Rockville PikeBethesda, MD 20889-0001
Phone(301) 400-2140
Sole ProprietorNo
Enumeration DateFebruary 24, 2020
Last NPPES UpdateSeptember 3, 20256 updates tracked since enumeration
NPPES CertifiedSeptember 3, 2025
✔ NPI 1386278984 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in VA · 0101273866
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
Also ListedGeneral PracticeTaxonomy 208D00000X · License 0101273866 (VA)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
8901 ROCKVILLE PIKE, 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)

Dr. Rebecca Wong Gregg Md, Mph is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
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.

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.

DR. LIESL SHOCKLEY GRENIER M.D.
Dermatology (Dermatopathology)
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4000
MEGAN JUDITH LENIHAN MD
Surgery
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4000
JOHNS HOPKINS UNIVERSITY
Internal Medicine (Endocrinology, Diabetes & Metabolism)
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 400-1382
NATASHA ANTONY MD
Obstetrics & Gynecology
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4600
MATTHEW NICHOLAS RIBEIRO MD
Anesthesiology
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4000
MR. ANDREW JOSEPH ULLMANN JR. DO
Internal Medicine
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (908) 635-6978
BRYCE TANNER GARDNER DMD
Military Health Care Provider
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4340
PARESH RAM PATEL MD
Emergency Medicine
8901 ROCKVILLE PIKE
BETHESDA, MD 20889
Montgomery County (301) 295-4810

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 Rebecca Gregg's NPI number?

The NPI number for Rebecca Gregg is 1386278984. It was assigned to this individual provider in the NPPES registry on February 24, 2020.

Where is Rebecca Gregg located?

Rebecca Gregg practices at 8901 Rockville Pike, Bethesda, MD 20889. The listed phone number is (301) 400-2140.

What is Rebecca Gregg's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Rebecca Gregg enrolled in Medicare?

Yes. Rebecca Gregg is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Rebecca Gregg was last updated on September 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.