GREGORY ZEMTSOV MD
NPI 1477014462
Obstetrics & Gynecology in Fishers, IN
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
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Gregory Zemtsov Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Gregory Zemtsov reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 5,212 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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.
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.
FISHERS, IN 46037
FISHERS, IN 46037
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.
Which organization bills Medicare for Gregory Zemtsov's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Zemtsov reassigns Medicare benefits to Iu Health Medical Group, LLC (Indianapolis, IN). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Zemtsov's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Zemtsov accept?
Health plans from Anthem Blue Cross and Blue Shield and CareSource list Gregory Zemtsov as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
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 59 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.
# Gregory Zemtsov, MD · NPI 1477014462
Obstetrics & Gynecology physician in Fishers, Indiana. Individual provider, active in the CMS NPPES registry since March 31, 2019.
## Identity
- **NPI:** 1477014462 (Entity type: Individual)
- **Enumerated:** March 31, 2019
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 01100243A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 13100 E 136TH ST, Fishers, IN 46037-9417
- **Phone:** (317) 944-9400
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Iu Health Medical Group, LLC (NPI 1326893777, Indianapolis, IN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 4, 2026
- **Other identifiers:** Medicaid 300135149 (IN)
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Source: [NPI Profile](https://npiprofile.com/npi/1477014462) · Data from the CMS NPPES public registry.