JOHN M O'BRIEN MD
NPI 1528078748
Obstetrics & Gynecology - Maternal & Fetal Medicine in Lexington, KY
About John M O'brien Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN M O'BRIEN MD (NPI 1528078748) is an individual maternal & fetal medicine provider in Lexington, Kentucky, licensed in Kentucky (30453) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with University Of Kentucky Hospital, and is a graduate of Wayne State University School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses 2
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 and accepts Medicare assignment
John M O'brien 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.
Medicare Billing Reassignment
Medicare enrollment records show John O'brien reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lexington, KY 40517
- Reassigned Medicare billing, Kentucky enrollment
- 1,502 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Kentucky Hospital
Acute Care Hospitals · Lexington, KYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 40536 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
LEXINGTON, KY 40536
LEXINGTON, KY 40536
LEXINGTON, KY 40536
LEXINGTON, KY 40536
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 John O'brien's NPI number?
The NPI number for John O'brien is 1528078748. It was assigned to this individual provider in the NPPES registry on August 9, 2006.
Where is John O'brien located?
John O'brien practices at 800 Rose Street Room C-368, Lexington, KY 40536. The listed phone number is (859) 257-9000.
What is John O'brien's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.
Is John O'brien enrolled in Medicare?
Yes. John O'brien is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for John O'brien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John O'brien reassigns Medicare benefits to Kentucky Medical Services Foundation, Inc (Lexington, KY). 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 John O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John O'brien accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter of Tennessee and Anthem Blue Cross and Blue Shield list John O'brien 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.
Is John O'brien affiliated with any hospitals?
According to CMS data, John O'brien is affiliated with University Of Kentucky Hospital.
When was this NPI record last updated?
The NPPES record for John O'brien was last updated on May 11, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.
# John M O'brien, MD · NPI 1528078748
Maternal & Fetal Medicine physician in Lexington, Kentucky. Individual provider, active in the CMS NPPES registry since August 9, 2006.
## Identity
- **NPI:** 1528078748 (Entity type: Individual)
- **Enumerated:** August 9, 2006
- **Primary specialty:** Obstetrics & Gynecology - Maternal & Fetal Medicine · taxonomy 207VM0101X
- **State license:** 30453 (Kentucky)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 ROSE STREET, ROOM C-368, Lexington, KY 40536-0293
- **Phone:** (859) 257-9000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Kentucky Medical Services Foundation, Inc (NPI 1326091448, Lexington, KY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 1988
## Record status
- **NPPES last updated:** May 11, 2022
- **Other identifiers:** Medicaid 64304538 (KY)
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Source: [NPI Profile](https://npiprofile.com/npi/1528078748) · Data from the CMS NPPES public registry.