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DR. CHIEN C OH MD
NPI 1427134071
Obstetrics & Gynecology - Maternal & Fetal Medicine in Phoenix, AZ

Active since October 27, 2006PECOS EnrolledAccepts Medicare Assignment
88.44/100
CMS Quality Rating
1441 N 12TH ST FL 3, PHOENIX, AZ 85006(602) 521-5700(602) 521-5701 Get Directions Write a Review

NPPES record last updated: March 31, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 31, 2026, Nov 21, 2022, Apr 9, 2021 and 2 more (5 updates tracked since 2017).

About Dr. Chien C Oh Md NPPES

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

DR. CHIEN C OH MD (NPI 1427134071) is an individual maternal & fetal medicine provider in Phoenix, Arizona, licensed in Arizona (36440) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Temple University School Of Medicine (1997).

NPPES Registry Identity

NPI1427134071
Entity TypeIndividualMale
Primary Taxonomy207VM0101X
Provider Legal NameDR. CHIEN C OHCredential: MD
Location Address1441 N 12TH ST FL 3Phoenix, AZ 85006-2837
Mailing Address1441 N 12th St Fl 3Phoenix, AZ 85006-2837 · (602) 521-5700 · Fax (602) 521-5701
Phone(602) 521-5700
Fax(602) 521-5701
Sole ProprietorNo
Medical School CMSTemple University School Of MedicineGraduated 1997
Enumeration DateOctober 27, 2006
Last NPPES UpdateMarch 31, 20265 updates tracked since enumeration
NPPES CertifiedMarch 31, 2026
✔ NPI 1427134071 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207VM0101X
License✔ Licensed in AZ · 36440
Definition
An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.
1441 N 12TH ST FL 3, Phoenix, AZ 85006
Open in Google Maps ↗

Other Identifiers 1

Medicaid174729AZ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Oscar Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Chien C Oh 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 ID8426097486
PECOS Enrollment IDI20070208000465
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 85006 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
$127.71 typical visit price
range $55.44 – $168.60
Typical copayment $31.92 (range $13.86 – $42.15)
Most-billed visit code 99204
Established Patient
$69.24 typical visit price
range $17.72 – $137.41
Typical copayment $17.31 (range $4.43 – $34.35)
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.

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.

88.44/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability98
Improvement Activities40
Cost59.36

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.

MRS. SONIA TERESA BRUNSON FNP-BC
Nurse Practitioner (Family)
1441 N 12TH ST FL 3
PHOENIX, AZ 85006
Maricopa County (602) 521-5700
MARY NOWLEN MD
Student in an Organized Health Care Education/Training Program
1441 N 12TH ST FL 3
PHOENIX, AZ 85006
Maricopa County (602) 521-5700
AMAYA IVON ALARCON TORRES DO
Student in an Organized Health Care Education/Training Program
1441 N 12TH ST FL 3
PHOENIX, AZ 85006
Maricopa County (602) 521-5700
DR. EMINA GULBIS MD
Student in an Organized Health Care Education/Training Program
1441 N 12TH ST FL 3
PHOENIX, AZ 85006
Maricopa County (602) 521-5700
DR. DANIEL D JAMESON DMD
Student in an Organized Health Care Education/Training Program
1441 N 12TH ST FL 3
PHOENIX, AZ 85006
Maricopa County (602) 521-5150
MR. PATRIC JOSEPH SIERZEGA P.A.-C
Physician Assistant (Medical)
1441 N 12TH ST FL 3
PHOENIX, AZ 85006
Maricopa County (602) 521-5770
SYDNEY MARIE WOODS DDS
Student in an Organized Health Care Education/Training Program
1441 N 12TH ST FL 3
PHOENIX, AZ 85006
Maricopa County (602) 521-5977
DR. TJISKA ELAINE CONROTTO DDS
Dentist (Oral and Maxillofacial Surgery)
1441 N 12TH ST FL 3
PHOENIX, AZ 85006
Maricopa County (602) 521-5150

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 Chien Oh's NPI number?

The NPI number for Chien Oh is 1427134071. It was assigned to this individual provider in the NPPES registry on October 27, 2006.

Where is Chien Oh located?

Chien Oh practices at 1441 N 12th St Fl 3, Phoenix, AZ 85006. The listed phone number is (602) 521-5700.

What is Chien Oh's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Is Chien Oh enrolled in Medicare?

Yes. Chien Oh 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.

What insurance does Chien Oh accept?

Health plans from Blue Cross Blue Shield of Arizona and Oscar Health Plan, Inc. list Chien Oh 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 Chien Oh was last updated on March 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.