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NASSER JANBAY M.D.
NPI 1699768374
Internal Medicine - Hematology & Oncology in Oklahoma City, OK

Active since August 26, 2005PECOS EnrolledAccepts Medicare Assignment
96.6/100
CMS Quality Rating
4401 MCAULEY BLVD STE 2700, OKLAHOMA CITY, OK 73120(405) 751-4343(405) 751-4346 Get Directions Write a Review

NPPES record last updated: April 30, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 30, 2026, Jun 2, 2025, Nov 4, 2024 and 3 more (6 updates tracked since 2016).

About Nasser Janbay M.d. NPPES

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

NASSER JANBAY M.D. (NPI 1699768374) is an individual hematology & oncology provider in Oklahoma City, Oklahoma, licensed in Oklahoma (25205) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Oklahoma City, Inc, and is a graduate of Other (1985).

NPPES Registry Identity

NPI1699768374
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameNASSER JANBAYCredential: M.D.
Location Address4401 MCAULEY BLVD STE 2700Oklahoma City, OK 73120-8565
Mailing AddressPo Box 776084Chicago, IL 60677-6084
Phone(405) 751-4343
Fax(405) 751-4346
Sole ProprietorNo
Medical School CMSOtherGraduated 1985
Enumeration DateAugust 26, 2005
Last NPPES UpdateApril 30, 20266 updates tracked since enumeration
NPPES CertifiedApril 30, 2026
✔ NPI 1699768374 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in OK · 25205✔ Licensed in KS · 48471
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
4401 MCAULEY BLVD STE 2700, Oklahoma City, OK 73120
Open in Google Maps ↗

Other Identifiers 1

Medicaid790936711AGA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan and more.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

Nasser Janbay M.d. 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 ID648175281
PECOS Enrollment IDI20070203000171
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

3

Medicare enrollment records show Nasser Janbay reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Clinic Oklahoma Communities
0.1 mi
Family Medicine
4300 W MEMORIAL RD
Oklahoma City, OK 73120
  • Reassigned Medicare billing, Oklahoma enrollment
  • 975 clinicians in this Medicare group
NPI 1386874550 (405) 752-3333
Mercy Hospital Oklahoma City, Inc
0.1 mi
Physical Therapist
4300 W MEMORIAL RD
Oklahoma City, OK 73120
  • Reassigned Medicare billing, Oklahoma enrollment
  • 110 clinicians in this Medicare group
NPI 1922192186 (405) 936-5041
Integris Ambulatory Care Corporation
1.9 mi
Family Medicine
3001 QUAIL SPRINGS PKWY
Oklahoma City, OK 73134
  • Reassigned Medicare billing, Oklahoma enrollment
  • 1,058 clinicians in this Medicare group
NPI 1750333936 (405) 951-2298

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
127 services77 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
92 services63 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
66 services55 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
26 services26 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
22 services17 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
19 services19 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercy Hospital Oklahoma City, Inc

Acute Care Hospitals · Oklahoma City, OK
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number370013
Location4300 West Memorial RoadOklahoma City, OK 73120 · Oklahoma County
Emergency services Birthing friendly

Oklahoma Heart Hospital, LLC

Acute Care Hospitals · Oklahoma City, OK
4/5 CMS rating
OwnershipPhysician
CMS Certification Number370215
Location4050 West Memorial RoadOklahoma City, OK 73120 · Oklahoma County
Emergency services

Mercy Hospital Kingfisher, Inc

Critical Access Hospitals · Kingfisher, OK
OwnershipVoluntary non-profit - Private
CMS Certification Number371313
Location1000 Hospital DriveKingfisher, OK 73750 · Kingfisher County
Emergency services

Mercy Hospital Guthrie

Critical Access Hospitals · Guthrie, OK
OwnershipVoluntary non-profit - Private
CMS Certification Number371317
Location200 S Academy RdGuthrie, OK 73044 · Logan County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73120 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
$162.61 typical visit price
range $53.00 – $162.61
Typical copayment $40.65 (range $13.25 – $40.65)
Most-billed visit code 99205
Established Patient
$94.27 typical visit price
range $16.68 – $132.40
Typical copayment $23.56 (range $4.17 – $33.10)
Most-billed visit code 99214
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.

96.6/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality92.24
Promoting Interoperability100
Improvement Activities40

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.

COLTON BOYLE APRN
Nurse Practitioner (Family)
4401 MCAULEY BLVD STE 2700
OKLAHOMA CITY, OK 73120
Oklahoma County (405) 751-4343
DR. DANIELLE N KRAMER-SMOTHERMAN D.O.
Internal Medicine (Hematology & Oncology)
4401 MCAULEY BLVD STE 2700
OKLAHOMA CITY, OK 73120
Oklahoma County (405) 751-4343
DR. CLAY THOMAS REED MD
Internal Medicine (Hematology & Oncology)
4401 MCAULEY BLVD STE 2700
OKLAHOMA CITY, OK 73120
Oklahoma County (405) 751-4343

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 Nasser Janbay's NPI number?

The NPI number for Nasser Janbay is 1699768374. It was assigned to this individual provider in the NPPES registry on August 26, 2005.

Where is Nasser Janbay located?

Nasser Janbay practices at 4401 Mcauley Blvd Ste 2700, Oklahoma City, OK 73120. The listed phone number is (405) 751-4343.

What is Nasser Janbay's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Nasser Janbay enrolled in Medicare?

Yes. Nasser Janbay 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 Nasser Janbay's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nasser Janbay reassigns Medicare benefits to 3 organizations: Mercy Clinic Oklahoma Communities (Oklahoma City, OK), Mercy Hospital Oklahoma City, Inc (Oklahoma City, OK) and Integris Ambulatory Care Corporation (Oklahoma City, OK). 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 Nasser Janbay's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nasser Janbay accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 3 other insurers list Nasser Janbay 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 Nasser Janbay affiliated with any hospitals?

According to CMS data, Nasser Janbay is affiliated with Mercy Hospital Oklahoma City, Inc, Oklahoma Heart Hospital, LLC, Mercy Hospital Kingfisher, Inc and Mercy Hospital Guthrie.

When was this NPI record last updated?

The NPPES record for Nasser Janbay was last updated on April 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.