1. Home
  2. Directory
  3. Indiana
  4. Fishers
  5. Obstetrics Gynecology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

GREGORY ZEMTSOV MD
NPI 1477014462
Obstetrics & Gynecology in Fishers, IN

Active since March 31, 2019PECOS Enrolled
13100 E 136TH ST, FISHERS, IN 46037(317) 944-9400 Get Directions Write a Review

NPPES record last updated: September 4, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

Record update history: Sep 4, 2026, Jul 3, 2023 (2 updates tracked since 2023).

About Gregory Zemtsov Md NPPES

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

GREGORY ZEMTSOV MD (NPI 1477014462) is an individual obstetrics & gynecology provider in Fishers, Indiana, licensed in Indiana (01100243A) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS and maintains a secondary practice location in Pittsburgh.

NPPES Registry Identity

NPI1477014462
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameGREGORY ZEMTSOVCredential: MD
Location Address13100 E 136TH STFishers, IN 46037-9417
Mailing Address250 N Shadeland AveIndianapolis, IN 46219-4959
Phone(317) 944-9400
Sole ProprietorNo
Enumeration DateMarch 31, 2019
Last NPPES UpdateSeptember 4, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 4, 2026
✔ NPI 1477014462 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in IN · 01100243A
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 ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
13100 E 136TH ST, Fishers, IN 46037
Open in Google Maps ↗

Secondary Practice Location 1

Location 1300 Halket Street, Suite 5600Pittsburgh, PA 15213 · Phone (412) 647-5815

Other Identifiers 1

Medicaid300135149IN

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregory Zemtsov Md 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 46037 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
$122.49 typical visit price
range $53.07 – $161.76
Typical copayment $30.62 (range $13.26 – $40.44)
Most-billed visit code 99204
Established Patient
$66.48 typical visit price
range $16.93 – $132.22
Typical copayment $16.62 (range $4.23 – $33.05)
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.

INDIANA UNIVERSITY HEALTH INC
Pharmacy (Community/Retail Pharmacy)
13100 E 136TH ST, SUITE 1000
FISHERS, IN 46037
Hamilton County (317) 678-3300
MARILYN D GATELY PA
Physician Assistant
13100 E 136TH ST, STE 1200
FISHERS, IN 46037
Hamilton County (317) 678-3100
DR. PROTIBHA SHOMA SANYAL MD
Family Medicine
13100 E 136TH ST
FISHERS, IN 46037
Hamilton County (317) 678-3100
DR. SEAN C KELLER
Internal Medicine
13100 E 136TH ST, STE 1200
FISHERS, IN 46037
Hamilton County (317) 678-3100
JENNIFER A STERN NP
Nurse Practitioner
13100 E 136TH ST, STE 3000
FISHERS, IN 46037
Hamilton County (317) 678-3900
MARLENE JEANETTE CERVANTES GONZALEZ DO
Internal Medicine
13100 E 136TH ST
FISHERS, IN 46037
Hamilton County (317) 678-2000
DOUGLAS K NAM MD
Internal Medicine (Cardiovascular Disease)
13100 E 136TH ST, SUITE 3000
FISHERS, IN 46037
Hamilton County (317) 678-3900
DANIEL B ENGLAND PA-C
Physician Assistant
13100 E 136TH ST, STE 2000
FISHERS, IN 46037
Hamilton County (317) 688-5980

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 Gregory Zemtsov's NPI number?

The NPI number for Gregory Zemtsov is 1477014462. It was assigned to this individual provider in the NPPES registry on March 31, 2019.

Where is Gregory Zemtsov located?

Gregory Zemtsov practices at 13100 E 136th St, Fishers, IN 46037. The listed phone number is (317) 944-9400.

What is Gregory Zemtsov's specialty?

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

Is Gregory Zemtsov enrolled in Medicare?

Yes. Gregory Zemtsov is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Gregory Zemtsov was last updated on September 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days 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.