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DR. HILLARY RUTH O'BRIEN MD
NPI 1922621903
Obstetrics & Gynecology in Reno, NV

Active since May 25, 2020PECOS EnrolledAccepts Medicare Assignment
901 E 2ND ST, RENO, NV 89502(775) 982-5000(775) 982-3901 Get Directions Write a Review

NPPES record last updated: September 5, 2024. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Sep 5, 2024, May 25, 2020 (2 updates tracked since 2020).

About Dr. Hillary Ruth O'brien Md NPPES

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

DR. HILLARY RUTH O'BRIEN MD (NPI 1922621903) is an individual obstetrics & gynecology provider in Reno, Nevada, licensed in Nevada (26126) and active in the NPI registry since May 2020. She is enrolled in Medicare PECOS, is affiliated with Renown Regional Medical Center, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1922621903
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. HILLARY RUTH O'BRIENCredential: MD
Location Address901 E 2ND STReno, NV 89502-1175
Mailing Address1155 Mill St # M14Reno, NV 89502-1576 · (775) 982-5262 · Fax (775) 982-5496
Phone(775) 982-5000
Fax(775) 982-3901
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMay 25, 2020
Last NPPES UpdateSeptember 5, 20242 updates tracked since enumeration
NPPES CertifiedSeptember 5, 2024
✔ NPI 1922621903 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in NV · 26126
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.
901 E 2ND ST, Reno, NV 89502
Open in Google Maps ↗

Other Identifiers 2

Other16212536NV · Caqh
Other26126NV · Nv License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter Health.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

Dr. Hillary Ruth 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.

PECOS PAC ID3678014727
PECOS Enrollment IDI20240917002868
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Hillary O'brien reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Community Care Services LLC
Same address
Obstetrics & Gynecology
901 E 2ND ST STE 307
Reno, NV 89502
  • Reassigned Medicare billing, Nevada enrollment
  • 735 clinicians in this Medicare group
NPI 1053882589 (775) 982-5000
Renown Transitional Care Services
0.3 mi
Obstetrics & Gynecology
975 RYLAND ST, SUITE 105
Reno, NV 89502
  • Reassigned Medicare billing, Nevada enrollment
  • 50 clinicians in this Medicare group
NPI 1437216645 (775) 982-5640

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.

Renown Regional Medical Center

Acute Care Hospitals · Reno, NV
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number290001
Location1155 Mill StreetReno, NV 89502 · Washoe County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 89502 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
$131.25 typical visit price
range $57.07 – $173.24
Typical copayment $32.81 (range $14.26 – $43.31)
Most-billed visit code 99204
Established Patient
$71.14 typical visit price
range $18.27 – $140.96
Typical copayment $17.78 (range $4.56 – $35.24)
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 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HALES 50 KIRMAN INC
Pharmacy (Community/Retail Pharmacy)
901 E 2ND ST, STE 102
RENO, NV 89502
Washoe County (775) 322-2171
SIERRA COMPOUNDING PHARMACY
Pharmacy (Community/Retail Pharmacy)
901 E 2ND ST, STE 102
RENO, NV 89502
Washoe County (775) 322-2171
SCOTT E JACOBS MD
Obstetrics & Gynecology
901 E 2ND ST, STE 307
RENO, NV 89502
Washoe County (775) 982-5000

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 Hillary O'brien's NPI number?

The NPI number for Hillary O'brien is 1922621903. It was assigned to this individual provider in the NPPES registry on May 25, 2020.

Where is Hillary O'brien located?

Hillary O'brien practices at 901 E 2nd St, Reno, NV 89502. The listed phone number is (775) 982-5000.

What is Hillary O'brien's specialty?

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

Is Hillary O'brien enrolled in Medicare?

Yes. Hillary 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 organizations bill Medicare for Hillary O'brien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hillary O'brien reassigns Medicare benefits to 2 organizations: Community Care Services LLC (Reno, NV) and Renown Transitional Care Services (Reno, NV). Each 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 Hillary O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Hillary O'brien accept?

Health plans from Ambetter Health and Ambetter from Arizona Complete Health list Hillary 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 Hillary O'brien affiliated with any hospitals?

According to CMS data, Hillary O'brien is affiliated with Renown Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Hillary O'brien was last updated on September 5, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.