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DR. AHMAD BASIL NASIR MD
NPI 1194345579
Hospitalist in Saint Louis, MO

Active since April 25, 2020PECOS EnrolledAccepts Medicare Assignment
1402 S GRAND BLVD RM M260, SAINT LOUIS, MO 63104(314) 617-2359 Get Directions Write a Review

NPPES record last updated: September 18, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 18, 2025, Sep 18, 2024, Dec 17, 2021 and 2 more (5 updates tracked since 2020).

About Dr. Ahmad Basil Nasir Md NPPES

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

DR. AHMAD BASIL NASIR MD (NPI 1194345579) is an individual hospitalist provider in Saint Louis, Missouri, licensed in Missouri (2024041686) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, is affiliated with Ascension St John Jane Phillips, and maintains a secondary practice location in Saint Louis.

NPPES Registry Identity

NPI1194345579
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameDR. AHMAD BASIL NASIRCredential: MD
Location Address1402 S GRAND BLVD RM M260Saint Louis, MO 63104-1004
Mailing Address1008 S Spring AveSaint Louis, MO 63110-2520 · (314) 617-3177
Phone(314) 617-2359
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateApril 25, 2020
Last NPPES UpdateSeptember 18, 20255 updates tracked since enumeration
NPPES CertifiedSeptember 18, 2025
✔ NPI 1194345579 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in MO · 2024041686
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedInternal MedicineTaxonomy 207R00000X · License 35765 (OK)
1402 S GRAND BLVD RM M260, Saint Louis, MO 63104
Open in Google Maps ↗

Secondary Practice Location 1

Location 13015 N Ballas RdSaint Louis, MO 63131-2329 · Phone (314) 996-5772

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Oklahoma.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. Ahmad Basil Nasir 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 ID4284168378
PECOS Enrollment IDI20241210002112
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 Ahmad Basil Nasir reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Physician Groups Lc
13 mi
Multi-Specialty
670 MASON RIDGE CENTER DR STE 300
Saint Louis, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 611 clinicians in this Medicare group
NPI 1285664268 (314) 996-7644
Emergency Medicine Physicians Of Tulsa County, LLC
359 mi
Emergency Medicine
6161 S YALE AVE
Tulsa, OK 74136
  • Reassigned Medicare billing, Oklahoma enrollment
  • 226 clinicians in this Medicare group
NPI 1003098773 (844) 474-4019
Usacs Observation Medicine Services Of Oklahoma, LLC
359 mi
Emergency Medicine
6161 S YALE AVE
Tulsa, OK 74136
  • Reassigned Medicare billing, Oklahoma enrollment
  • 300 clinicians in this Medicare group
NPI 1326739111 (844) 474-4019

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

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.

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
21 services20 patients

Hospital Affiliations CMS Care Compare 5

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

Ascension St John Jane Phillips

Acute Care Hospitals · Bartlesville, OK
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number370018
Location3500 East Frank Phillips BoulevardBartlesville, OK 74006 · Washington County
Emergency services Birthing friendly

Ascension St John Medical Center

Acute Care Hospitals · Tulsa, OK
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number370114
Location1923 South Utica AvenueTulsa, OK 74104 · Tulsa County
Emergency services Birthing friendly

St John Owasso

Acute Care Hospitals · Owasso, OK
OwnershipVoluntary non-profit - Private
CMS Certification Number370227
Location12451 East 100th Street NorthOwasso, OK 74055 · Tulsa County
Emergency services Birthing friendly

Ascension St John Broken Arrow

Acute Care Hospitals · Broken Arrow, OK
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number370235
Location1000 West Boise CircleBroken Arrow, OK 74012 · Tulsa County
Emergency services

Ascension St John Sapulpa

Critical Access Hospitals · Sapulpa, OK
OwnershipVoluntary non-profit - Private
CMS Certification Number371312
Location1004 East BryanSapulpa, OK 74066 · Creek County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63104 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
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
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.

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.

HOURI ESMAEIL KHANIAN MD
Student in an Organized Health Care Education/Training Program
1402 S GRAND BLVD RM M260
SAINT LOUIS, MO 63104
St. Louis City (314) 617-2408
STEPHEN CHRISTOPHER REAM
Pediatrics (Pediatric Cardiology)
1402 S GRAND BLVD RM M260
SAINT LOUIS, MO 63104
St. Louis City (314) 617-2359
ROXANNA HAMIDPOUR MD
Student in an Organized Health Care Education/Training Program
1402 S GRAND BLVD RM M260
SAINT LOUIS, MO 63104
St. Louis City (913) 486-1596
STEPHEN COLE NAPIER DO
Student in an Organized Health Care Education/Training Program
1402 S GRAND BLVD RM M260
SAINT LOUIS, MO 63104
St. Louis City (314) 617-2359
THOMAS YU XIA
Student in an Organized Health Care Education/Training Program
1402 S GRAND BLVD RM M260
SAINT LOUIS, MO 63104
St. Louis City (314) 977-9853
DR. NICOLAS KATKHORDEH MAYNARD MD
Student in an Organized Health Care Education/Training Program
1402 S GRAND BLVD RM M260
SAINT LOUIS, MO 63104
St. Louis City (314) 617-2359
MILES CHARLES
Student in an Organized Health Care Education/Training Program
1402 S GRAND BLVD RM M260
SAINT LOUIS, MO 63104
St. Louis City (314) 977-9851
DR. PETER KEYVAN FIROUZBAKHT M.D.
Student in an Organized Health Care Education/Training Program
1402 S GRAND BLVD RM M260
SAINT LOUIS, MO 63104
St. Louis City (314) 577-5317

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 Ahmad Basil Nasir's NPI number?

The NPI number for Ahmad Basil Nasir is 1194345579. It was assigned to this individual provider in the NPPES registry on April 25, 2020.

Where is Ahmad Basil Nasir located?

Ahmad Basil Nasir practices at 1402 S Grand Blvd Rm M260, Saint Louis, MO 63104. The listed phone number is (314) 617-2359.

What is Ahmad Basil Nasir's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Ahmad Basil Nasir enrolled in Medicare?

Yes. Ahmad Basil Nasir 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 Ahmad Basil Nasir's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ahmad Basil Nasir reassigns Medicare benefits to 3 organizations: Physician Groups Lc (Saint Louis, MO), Emergency Medicine Physicians Of Tulsa County, LLC (Tulsa, OK) and Usacs Observation Medicine Services Of Oklahoma, LLC (Tulsa, 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 Ahmad Basil Nasir's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ahmad Basil Nasir accept?

Health plans from Blue Cross and Blue Shield of Oklahoma list Ahmad Basil Nasir 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 Ahmad Basil Nasir affiliated with any hospitals?

According to CMS data, Ahmad Basil Nasir is affiliated with Ascension St John Jane Phillips, Ascension St John Medical Center, St John Owasso, Ascension St John Broken Arrow and Ascension St John Sapulpa.

When was this NPI record last updated?

The NPPES record for Ahmad Basil Nasir was last updated on September 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.