DR. MARK D KELEMEN M.D.
NPI 1902850548
Internal Medicine - Cardiovascular Disease in Baltimore, MD

Q: What is Mark Kelemen's NPI number?

The NPI number for Mark Kelemen is 1902850548. It was assigned to this individual provider in the NPPES registry on May 19, 2006.

Q: What is Mark Kelemen'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 Mark Kelemen was last updated on November 3, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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 May 19, 2006PECOS Enrolled

22 S GREENE ST, BALTIMORE, MD 21201(410) 790-7690(410) 328-8225 Get Directions Write a Review

NPPES record last updated: November 3, 2010. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Mark D Kelemen M.d. NPPES

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

DR. MARK D KELEMEN M.D. (NPI 1902850548) is an individual cardiovascular disease provider in Baltimore, Maryland, licensed in Maryland (D45643) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Johns Hopkins University School Of Medicine (1990).

NPPES Registry Identity

NPI1902850548

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameDR. MARK D KELEMENCredential: M.D.

Location Address22 S GREENE STBaltimore, MD 21201-1544

Mailing AddressPo Box 64442Baltimore, MD 21264-4442 · (410) 790-7690 · Fax (410) 328-8225

Phone(410) 790-7690

Fax(410) 328-8225

Sole ProprietorNo

Medical School CMSJohns Hopkins University School Of MedicineGraduated 1990

Enumeration DateMay 19, 2006

Last NPPES UpdateNovember 3, 2010

✔ NPI 1902850548 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in MD · D45643

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 ListedInternal Medicine · Interventional CardiologyTaxonomy 207RI0011X · License D45643 (ME)

22 S GREENE ST, Baltimore, MD 21201

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Other Identifiers 8

Medicaid037572100DC

Other532666-09MD · Blue Cross/blue Shield

Medicaid157011100MD

Medicare PIN060068953MD

Medicare PINS083E567MD

Medicare UPINF88940

Medicaid3810000258WV

Medicaid1902850548DE

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark D Kelemen M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6103019849

PECOS Enrollment IDI20101026000633, I20260615002026

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 Kelemen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Johns Hopkins University

1.7 mi

Urology

601 N CAROLINE ST
Baltimore, MD 21287

Reassigned Medicare billing, Maryland enrollment
4,483 clinicians in this Medicare group

NPI 1295731966 (410) 955-5000

Greater Baltimore Medical Center, Inc.

7.0 mi

Surgery

6565 N CHARLES ST STE 501
Baltimore, MD 21204

Reassigned Medicare billing, Maryland enrollment
444 clinicians in this Medicare group

NPI 1013739382 (443) 849-4800

Appledore Medical Group, Inc.

396 mi

Family Medicine

29 LAFAYETTE RD
North Hampton, NH 03862

Reassigned Medicare billing, New Hampshire enrollment
185 clinicians in this Medicare group

NPI 1174512693 (603) 964-9370

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 19

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.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

1,962 services1,087 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.

389 services387 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.

335 services173 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.

208 services147 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

155 services118 patients

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

146 services145 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

122 services121 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.

90 services87 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.

86 services80 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

86 services83 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.

41 services41 patients

Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days 93244

A heart rhythm review involves monitoring your heart's electrical activity for more than 48 hours up to 7 days. Using a device called an external EKG, doctors can track your heartbeats to detect irregularities and help diagnose heart conditions.

41 services41 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.

28 services28 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.

25 services25 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

22 services17 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

18 services18 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.

15 services15 patients

Ultrasound of heart blood flow, valves and chambers, follow-up 93321

This procedure, an echocardiogram, uses sound waves to create images of your heart. It aids in assessing your heart's blood flow, chambers, and valves. It's a follow-up procedure, ensuring that your heart is functioning properly post-treatment.

13 services13 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.

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.

Johns Hopkins Hospital, The

Acute Care Hospitals · Baltimore, MD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210009

Location600 North Wolfe StreetBaltimore, MD 21287 · Baltimore City County

Emergency services Birthing friendly

Medstar Franklin Square Medical Center

Acute Care Hospitals · Rosedale, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210015

Location9000 Franklin Square DriveRosedale, MD 21237 · Baltimore County

Emergency services Birthing friendly

Johns Hopkins Bayview Medical Center

Acute Care Hospitals · Baltimore, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210029

Location4940 Eastern AvenueBaltimore, MD 21224 · Baltimore City County

Emergency services Birthing friendly

Greater Baltimore Medical Center

Acute Care Hospitals · Baltimore, MD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210044

Location6701 North Charles StreetBaltimore, MD 21204 · Baltimore County

Emergency services Birthing friendly

Catholic Medical Center

Acute Care Hospitals · Manchester, NH

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number300034

Location100 Mcgregor StreetManchester, NH 03102 · Hillsborough County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21201 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

$139.05 typical visit price

range $60.73 – $183.44

Typical copayment $34.76 (range $15.18 – $45.86)

Most-billed visit code 99204

Established Patient

$75.47 typical visit price

range $19.60 – $149.17

Typical copayment $18.86 (range $4.90 – $37.29)

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.

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.

DR. LEONARD ANANG SOWAH M.D.

Internal Medicine

22 S GREENE ST
BALTIMORE, MD 21201

Baltimore City (410) 706-4619

VISHAL BHATNAGAR MD

Student in an Organized Health Care Education/Training Program

22 S GREENE ST, MEDICINE, N3E09
BALTIMORE, MD 21201

Baltimore City (410) 328-6110

NANCE J FOX P.A.-C

Physician Assistant (Medical)

22 S GREENE ST, G2K36
BALTIMORE, MD 21201

Baltimore City (410) 328-1170

HILARY TAMARA WOLF MD

Pediatrics (Adolescent Medicine)

22 S GREENE ST
BALTIMORE, MD 21201

Baltimore City (410) 328-7373

MS. LINDSAY BREAM O'MEARA CRNP

Nurse Practitioner (Acute Care)

22 S GREENE ST, SUITE S4D07
BALTIMORE, MD 21201

Baltimore City (410) 328-3365

NORA T OLIVER M.D., M.P.H.

Student in an Organized Health Care Education/Training Program

22 S GREENE ST, N3E09
BALTIMORE, MD 21201

Baltimore City (410) 328-5756

SHOSHANA JO WEINER

Internal Medicine

22 S GREENE ST
BALTIMORE, MD 21201

Baltimore City (617) 214-1332

JENNA VANLIERE CANZONIERO M.D.

Internal Medicine

22 S GREENE ST, N3E09
BALTIMORE, MD 21201

Baltimore City (410) 328-5756

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 Kelemen's NPI number?

The NPI number for Mark Kelemen is 1902850548. It was assigned to this individual provider in the NPPES registry on May 19, 2006.

Where is Mark Kelemen located?

Mark Kelemen practices at 22 S Greene St, Baltimore, MD 21201. The listed phone number is (410) 790-7690.

What is Mark Kelemen's specialty?

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

Is Mark Kelemen enrolled in Medicare?

Yes. Mark Kelemen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Kelemen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Kelemen reassigns Medicare benefits to 3 organizations: Johns Hopkins University (Baltimore, MD), Greater Baltimore Medical Center, Inc. (Baltimore, MD) and Appledore Medical Group, Inc. (North Hampton, NH). 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 Kelemen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Kelemen accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Mark Kelemen 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 Kelemen affiliated with any hospitals?

According to CMS data, Mark Kelemen is affiliated with Johns Hopkins Hospital, The, Medstar Franklin Square Medical Center, Johns Hopkins Bayview Medical Center, Greater Baltimore Medical Center and Catholic Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Kelemen was last updated on November 3, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.