DR. MARK ALLEN GDOWSKI MD
NPI 1831453505
Internal Medicine - Interventional Cardiology in Chesterfield, MO

Q: What is Mark Gdowski's NPI number?

The NPI number for Mark Gdowski is 1831453505. It was assigned to this individual provider in the NPPES registry on June 27, 2012.

Q: What is Mark Gdowski's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.

Q: When was this NPI record last updated?

The NPPES record for Mark Gdowski was last updated on November 11, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since June 27, 2012PECOS EnrolledAccepts Medicare Assignment

89.23/100

CMS Quality Rating

121 SAINT LUKES CENTER DR STE 303, CHESTERFIELD, MO 63017(314) 434-3278(314) 590-5949 Get Directions Write a Review

NPPES record last updated: November 11, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 11, 2021, Jul 28, 2021, Oct 1, 2015 (3 updates tracked since 2015).

On this page

About Dr. Mark Allen Gdowski Md NPPES

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

DR. MARK ALLEN GDOWSKI MD (NPI 1831453505) is an individual interventional cardiology provider in Chesterfield, Missouri, licensed in Missouri (2014024076) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS, is affiliated with Memorial Hospital, and maintains a secondary practice location in Saint Louis.

NPPES Registry Identity

NPI1831453505

Entity TypeIndividualMale

Primary Taxonomy207RI0011X

Provider Legal NameDR. MARK ALLEN GDOWSKICredential: MD

Location Address121 SAINT LUKES CENTER DR STE 303Chesterfield, MO 63017-3519

Mailing Address121 Saint Lukes Center Dr Ste 303Chesterfield, MO 63017-3519 · (314) 434-3278 · Fax (314) 590-5949

Phone(314) 434-3278

Fax(314) 590-5949

Sole ProprietorNo

Medical School CMSUniversity Of Kansas School Of Med (kc/wich/sal)Graduated 2012

Enumeration DateJune 27, 2012

Last NPPES UpdateNovember 11, 20213 updates tracked since enumeration

NPPES CertifiedNovember 11, 2021

✔ NPI 1831453505 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Interventional CardiologyAllopathic & Osteopathic Physicians

Taxonomy Code207RI0011X

License✔ Licensed in MO · 2014024076

Definition

An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.

121 SAINT LUKES CENTER DR STE 303, Chesterfield, MO 63017

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Secondary Practice Location 1

Location 1450 N New Ballas Rd Ste 270Saint Louis, MO 63141-6859 · Phone (314) 991-6969 · Fax (314) 997-6969

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Kansas, Inc., Blue Cross and Blue Shield of Texas 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. Mark Allen Gdowski 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 ID8628206612

PECOS Enrollment IDI20150527000397

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 Mark Gdowski reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Heart Health Specialists, LLC

Same address

Cardiovascular Disease

121 SAINT LUKES CENTER DR STE 303
Chesterfield, MO 63017

Reassigned Medicare billing, Missouri enrollment
15 clinicians in this Medicare group

NPI 1053756296 (314) 434-3278

Heart Care Specialists, LLC

3.6 mi

Medical Specialty

450 N NEW BALLAS RD STE 270
Saint Louis, MO 63141

Reassigned Medicare billing, Missouri enrollment
18 clinicians in this Medicare group

NPI 1275031866 (314) 991-6969

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 15

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.

733 services456 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

341 services123 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

216 services200 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.

165 services145 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.

157 services154 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.

151 services143 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.

137 services137 patients

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.

117 services104 patients

Ultrasound evaluation of heart blood vessel or graft with review by radiologist, initial vessel 92978

This procedure involves using ultrasound technology to examine the first vessel of your heart or graft. A radiologist will review the images. It's a non-invasive way to check the health of your heart's blood vessels.

57 services54 patients

Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch 92928

This procedure involves placing a small, mesh tube (stent) in your coronary artery to keep it open. A balloon is used to expand the stent and artery, improving blood flow to your heart. It's typically done for a single artery or branch.

48 services40 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

44 services25 patients

Insertion of tube in left lower heart chamber, coronary artery and bypass graft for diagnosis with review by radiologist 93459

This procedure involves placing a tube into your left lower heart chamber, coronary artery, and bypass graft. It's done for diagnostic purposes and is carefully reviewed by a radiologist. This helps determine the health of your heart and arteries, aiding in future treatment plans.

32 services32 patients

Replacement of aortic valve through the skin and femoral artery 33361

This procedure, known as Transcatheter Aortic Valve Replacement (TAVR), involves replacing a damaged aortic valve through a small incision in the leg. A catheter is inserted into the femoral artery and guided up to the heart. The new valve is then positioned and deployed, restoring normal blood flow.

21 services21 patients

Ultrasound evaluation of heart blood vessel during diagnosis or treatment, initial vessel 93571

This procedure involves using ultrasound technology to examine the first blood vessel of your heart. It helps identify any abnormalities or issues, providing crucial information for diagnosis or treatment. It's a safe, non-invasive process.

21 services21 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.

14 services14 patients

Hospital Affiliations CMS Care Compare 3

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

Memorial Hospital

Acute Care Hospitals · Belleville, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140185

Location4500 Memorial DriveBelleville, IL 62226 · St. Clair County

Emergency services Birthing friendly

Phelps County Regional Medical Center

Acute Care Hospitals · Rolla, MO

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number260017

Location1000 W 10th StRolla, MO 65401 · Phelps County

Emergency services Birthing friendly

St Lukes Hospital

Acute Care Hospitals · Chesterfield, MO

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number260179

Location232 S Woods Mill RdChesterfield, MO 63017 · St. Louis County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63017 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.

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.

89.23/100

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

Scored through an Alternative Payment Model

Quality

84.14

Improvement Activities

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.

HEART HEALTH SPECIALISTS, LLC

Internal Medicine (Cardiovascular Disease)

121 SAINT LUKES CENTER DR STE 303
CHESTERFIELD, MO 63017

St. Louis County (314) 434-3278

COURTNEY D BAXTER-BAUBLITZ ANP

Nurse Practitioner

121 SAINT LUKES CENTER DR STE 303
CHESTERFIELD, MO 63017

St. Louis County (143) 434-3278

JENNA LAURA GRANAHAN RN

Registered Nurse

121 SAINT LUKES CENTER DR STE 303
CHESTERFIELD, MO 63017

St. Louis County (314) 434-3278

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 Mark Gdowski's NPI number?

The NPI number for Mark Gdowski is 1831453505. It was assigned to this individual provider in the NPPES registry on June 27, 2012.

Where is Mark Gdowski located?

Mark Gdowski practices at 121 Saint Lukes Center Dr Ste 303, Chesterfield, MO 63017. The listed phone number is (314) 434-3278.

What is Mark Gdowski's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.

Is Mark Gdowski enrolled in Medicare?

Yes. Mark Gdowski 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 Mark Gdowski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Gdowski reassigns Medicare benefits to 2 organizations: Heart Health Specialists, LLC (Chesterfield, MO) and Heart Care Specialists, LLC (Saint Louis, MO). 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 Mark Gdowski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Gdowski accept?

Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Kansas, Inc., Blue Cross and Blue Shield of Texas, Medica and Oscar Insurance Company and 1 other insurer list Mark Gdowski 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 Mark Gdowski affiliated with any hospitals?

According to CMS data, Mark Gdowski is affiliated with Memorial Hospital, Phelps County Regional Medical Center and St Lukes Hospital.

When was this NPI record last updated?

The NPPES record for Mark Gdowski was last updated on November 11, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.