DR. RIAZ AHMED SIRAJUDDIN M.D.
NPI 1235186099
Internal Medicine - Cardiovascular Disease in Oklahoma City, OK

Q: What is Riaz Sirajuddin's NPI number?

The NPI number for Riaz Sirajuddin is 1235186099. It was assigned to this individual provider in the NPPES registry on May 27, 2006. The provider is also known as Dr. Riaz Ahmed Sirajuddin M.D..

Q: What is Riaz Sirajuddin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for Riaz Sirajuddin was last updated on February 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.

Active since May 27, 2006PECOS EnrolledAccepts Medicare Assignment

70.19/100

CMS Quality Rating

10413 GREENBRIAR PKWY, OKLAHOMA CITY, OK 73159(405) 691-4665(405) 378-7628 Get Directions Write a Review

NPPES record last updated: February 24, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Riaz Ahmed Sirajuddin M.d. NPPES

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

DR. RIAZ AHMED SIRAJUDDIN M.D. (NPI 1235186099) is an individual cardiovascular disease provider in Oklahoma City, Oklahoma, licensed in Oklahoma (22726) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Adena Regional Medical Center, and maintains a secondary practice location in Chillicothe.

NPPES Registry Identity

NPI1235186099

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameDR. RIAZ AHMED SIRAJUDDINCredential: M.D.

Location Address10413 GREENBRIAR PKWYOklahoma City, OK 73159-7656

Mailing Address10413 Greenbriar ParkwayOklahoma City, OK 73159-6923 · (405) 691-4665 · Fax (405) 378-7628

Phone(405) 691-4665

Fax(405) 378-7628

Sole ProprietorNo

Medical School CMSIndiana University School Of MedicineGraduated 1991

Enumeration DateMay 27, 2006

Last NPPES UpdateFebruary 24, 2026

NPPES CertifiedFebruary 24, 2026

✔ NPI 1235186099 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

Licenses✔ Licensed in OK · 22726✔ Licensed in OH · 35.071247

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

Also ListedSpecialistTaxonomy 174400000X · License 22726 (OK)

10413 GREENBRIAR PKWY, Oklahoma City, OK 73159

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Other Names 1

Professional Name (2)Dr. Riaz Ahmed Sirajuddin M.d.

Secondary Practice Location 1

Location 1272 Hospital Rd Ste 125Chillicothe, OH 45601-9031 · Phone (740) 779-4570

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Buckeye Health Plan, Ambetter from Meridian 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

Dr. Riaz Ahmed Sirajuddin 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 ID4486632353

PECOS Enrollment IDI20040708001014, I20250602001142

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

Medicare enrollment records show Riaz Sirajuddin reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Riaz A. Sirajuddin MD PC

Same address

Cardiovascular Disease

10413 GREENBRIAR PKWY
Oklahoma City, OK 73159

Reassigned Medicare billing, Oklahoma enrollment
2 clinicians in this Medicare group

NPI 1508976648 (405) 691-4665

Adena Medical Group LLC

848 mi

Family Medicine

272 HOSPITAL RD
Chillicothe, OH 45601

Reassigned Medicare billing, Ohio enrollment
763 clinicians in this Medicare group

NPI 1235468083 (740) 779-7500

Union Physician Services, LLC

946 mi

Family Medicine

659 BOULEVARD ST
Dover, OH 44622

Reassigned Medicare billing, Ohio enrollment
126 clinicians in this Medicare group

NPI 1215169826 (330) 364-0805

Rutland Hospital, Inc.

1,425 mi

Specialist

160 ALLEN ST
Rutland, VT 05701

Reassigned Medicare billing, Vermont enrollment
76 clinicians in this Medicare group

NPI 1578527578 (802) 775-7111

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 20

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.

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.

940 services314 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

177 services164 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

130 services125 patients

Evaluation of implantable heart and blood vessel monitoring system, remote up to 30 days 93297

This service involves remotely monitoring your heart and blood vessel implant system for up to 30 days. Using advanced technology, healthcare professionals can track the device's performance and your health status, ensuring the system is working optimally for your needs.

105 services12 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days 93294

This procedure evaluates your pacemaker system remotely for up to 90 days. It checks whether single, dual, multiple lead, or leadless pacemakers are working properly. It's a safe, convenient way to ensure your heart device is functioning optimally.

74 services24 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

73 services70 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

44 services40 patients

Heart muscle strain imaging 93356

Heart muscle strain imaging is a non-invasive test that uses sound waves to create pictures of your heart. It helps doctors evaluate how well your heart muscle is working and detect any damage or disease. This can aid in diagnosing heart conditions and guiding treatment plans.

27 services26 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.

26 services26 patients

Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days 93295

This procedure involves remotely monitoring your implantable defibrillator system, which can have single, dual, or multiple leads. Over a period of up to 90 days, the system's performance is evaluated to ensure it's working properly and providing the necessary heart rhythm support.

23 services11 patients

Heart rhythm recording of continous external ekg over 8-15 days 93246

A heart rhythm recording is a non-invasive procedure where a small device, attached externally, monitors your heart's electrical activity for 8-15 days. It helps detect irregular heart rhythms, assess heart rate, and guide treatment decisions. It's safe, painless, and can be done during normal daily activities.

22 services22 patients

Heart rhythm review and interpretation of continous external ekg over 8-15 days 93248

This service involves wearing a device for 8-15 days that continuously records your heart's electrical activity. It helps in identifying irregular heart rhythms. The recorded data is then reviewed and interpreted by a healthcare professional for any abnormalities.

21 services21 patients

Ultrasound of leg arteries or artery grafts 93925

An ultrasound of leg arteries or artery grafts is a non-invasive imaging test. It uses high-frequency sound waves to capture live images from inside your body, specifically your leg arteries or grafts. This helps in detecting any blockages or abnormalities.

21 services19 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.

21 services21 patients

Ultrasound study of arm and leg arteries 93922

An ultrasound study of arm and leg arteries is a non-invasive procedure that uses sound waves to create images of your arteries. It helps in checking blood flow, identifying blockages, or detecting other abnormalities in your arteries.

18 services16 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.

18 services16 patients

Ultrasound of both sides of head and neck blood flow 93880

13 services13 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

12 services12 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

12 services12 patients

Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist 93458

This procedure involves placing a tube into your left lower heart chamber and coronary artery. It helps doctors diagnose heart conditions by allowing them to view these areas in detail. A radiologist will review the images to ensure accurate diagnosis.

12 services12 patients

Hospital Affiliations CMS Care Compare 5

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

Adena Regional Medical Center

Acute Care Hospitals · Chillicothe, OH

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number360159

Location272 Hospital RoadChillicothe, OH 45601 · Ross County

Emergency services Birthing friendly

Adena Pike Medical Center

Critical Access Hospitals · Waverly, OH

OwnershipVoluntary non-profit - Private

CMS Certification Number361334

Location100 Dawn LaneWaverly, OH 45690 · Pike County

Emergency services

Ssm Health St Anthony Hospital - Oklahoma City

Acute Care Hospitals · Oklahoma City, OK

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number370037

Location1000 North Lee AvenueOklahoma City, OK 73101 · Oklahoma County

Emergency services Birthing friendly

The Physicians' Hospital In Anadarko

Critical Access Hospitals · Anadarko, OK

OwnershipProprietary

CMS Certification Number371314

Location1002 E Central BlvdAnadarko, OK 73005 · Caddo County

Emergency services

Carnegie Tri-County Municipal Hospital

Critical Access Hospitals · Carnegie, OK

OwnershipGovernment - Hospital District or Authority

CMS Certification Number371334

Location102 North BroadwayCarnegie, OK 73015 · Caddo County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 73159 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

$123.06 typical visit price

range $53.00 – $162.61

Typical copayment $30.76 (range $13.25 – $40.65)

Most-billed visit code 99204

Established Patient

$66.48 typical visit price

range $16.68 – $132.40

Typical copayment $16.62 (range $4.17 – $33.10)

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.

70.19/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

99.74

Improvement Activities

Cost

75.71

Reported Quality Measures

Closing the Referral Loop: Receipt of Specialist Report

100%20 patients5/55-star benchmark: 87%

Diabetes: Hemoglobin A1c (HbA1c) Poor Control (>9%)

Lower rates are better for this measure.

17%317 patients4/55-star benchmark: 91%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

25%1,632 patients2/55-star benchmark: 98%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients combinedPopulations: 99% · 1,241 patients

Patients screened: 100% · 1,241 patients

99%204 patients4/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 9

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tubing with integrated heating element for use with positive airway pressure device A4604