DR. MARY ELIZABETH CALLSEN
NPI 1639137573
Internal Medicine in Bethesda, MD

Q: What is Mary Callsen's NPI number?

The NPI number for Mary Callsen is 1639137573. It was assigned to this individual provider in the NPPES registry on May 2, 2006.

Q: What is Mary Callsen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Mary Callsen was last updated on January 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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 02, 2006PECOS EnrolledAccepts Medicare Assignment

7315 WISCONSIN AVE, BETHESDA, MD 20814(240) 235-9100 Get Directions Write a Review

NPPES record last updated: January 27, 2023. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Mary Elizabeth Callsen NPPES

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

DR. MARY ELIZABETH CALLSEN (NPI 1639137573) is an individual internal medicine provider in Bethesda, Maryland, licensed in Maryland (D0059499) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and maintains a secondary practice location in Chevy Chase.

NPPES Registry Identity

NPI1639137573

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. MARY ELIZABETH CALLSEN

Location Address7315 WISCONSIN AVEBethesda, MD 20814-3202

Mailing Address6201 Greenleigh AveBaltimore, MD 21220-2004

Phone(240) 235-9100

Sole ProprietorNo

Medical School CMSOhio State University College Of MedicineGraduated 1981

Enumeration DateMay 2, 2006

Last NPPES UpdateJanuary 27, 2023

NPPES CertifiedJanuary 27, 2023

✔ NPI 1639137573 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in MD · D0059499

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

7315 WISCONSIN AVE, Bethesda, MD 20814

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Secondary Practice Location 1

Location 17513 Wisconsin Ave, Suite 645Chevy Chase, MD 20815-4404 · Phone (301) 656-4545

Other Identifiers 11

Other1588055MD · Cigna Provider Number

Other5770131MD · Aetna Ppo Provider Number

Other61813201MD · Bsmd Provider Number

Other8127031MD · Mdipa Provider Number

Other9070 0013MD · Bsdc Provider Number

Other8127031MD · Optimum Choice Provider #

Other100797MD · Jhhc Provider Number

Other521186611MD · United Healthcare Prov #

Other8127031MD · Alliance Provider Number

Other5770131MD · Aetna Hmo Provider Number

Other8127031MD · Mamsi Provider Number

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mary Elizabeth Callsen 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 ID5395874655

PECOS Enrollment IDI20100525000299

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.

Areas of Expertise CMS Part B claims 14

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.

447 services284 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

387 services387 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.

353 services343 patients

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.

158 services135 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.

110 services95 patients

Influenza vaccine split virus, preservative free 90662

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

84 services83 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

84 services83 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

56 services37 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.

46 services40 patients

Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677

The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.

18 services18 patients

Administration of pneumococcal vaccine G0009

The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.

17 services17 patients

Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus 87426

An immunoassay test for severe acute respiratory syndrome coronavirus is a diagnostic tool. It uses your body's immune response to detect the presence of the virus. It involves taking a sample, usually from your nose or throat, which is then analyzed in a lab for signs of the virus.

13 services12 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

13 services13 patients

Transitional care management services for problem of high complexity 99496

Transitional care management services are designed to ensure a smooth transition from a hospital to home or another care setting for patients with complex health issues. These services include medication management, patient education, and coordination with healthcare providers.

13 services13 patients

Hospital Affiliations CMS Care Compare

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20814 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

$147.85 typical visit price

range $65.18 – $194.86

Typical copayment $36.96 (range $16.29 – $48.71)

Most-billed visit code 99204

Established Patient

$113.72 typical visit price

range $21.40 – $158.88

Typical copayment $28.43 (range $5.35 – $39.72)

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.

Referred Medical Equipment & Supplies CMS DME claims

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

13 suppliers30 claims87 services$6.39 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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Other Providers at the Same Location NPPES 18

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. SHABINA ROOHI AHMED M.D.

Internal Medicine (Endocrinology, Diabetes & Metabolism)

7315 WISCONSIN AVE
BETHESDA, MD 20814

Montgomery County (240) 235-9120

CAROLYN KIE-LO WANG D.O.

Psychiatry & Neurology (Neurology)

7315 WISCONSIN AVE
BETHESDA, MD 20814

Montgomery County (240) 235-9120

KARAN PAVAN NATHANI

Psychiatry & Neurology (Neurology)

7315 WISCONSIN AVE
BETHESDA, MD 20814

Montgomery County (410) 955-5000

OMID MOTABAR M.D.

Psychiatry & Neurology (Neurology)

7315 WISCONSIN AVE
BETHESDA, MD 20814

Montgomery County (240) 837-9140

MISS SAHER HAMEED RIZVI MD

Psychiatry & Neurology (Neurology)

7315 WISCONSIN AVE, SUITE 700
BETHESDA, MD 20814

Montgomery County (240) 235-9100

TARA SALIMI DO

Family Medicine

7315 WISCONSIN AVE
BETHESDA, MD 20814

Montgomery County (410) 955-5000

REGINA KUNDELL CRNP

Nurse Practitioner (Family)

7315 WISCONSIN AVE
BETHESDA, MD 20814

Montgomery County (240) 235-9120

MRS. RUGIATU JALLOH-CAMARA FNP

Nurse Practitioner (Family)

7315 WISCONSIN AVE
BETHESDA, MD 20814

Montgomery County (240) 235-9100

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 Mary Callsen's NPI number?

The NPI number for Mary Callsen is 1639137573. It was assigned to this individual provider in the NPPES registry on May 2, 2006.

Where is Mary Callsen located?

Mary Callsen practices at 7315 Wisconsin Ave, Bethesda, MD 20814. The listed phone number is (240) 235-9100.

What is Mary Callsen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mary Callsen enrolled in Medicare?

Yes. Mary Callsen 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.

Is Mary Callsen affiliated with any hospitals?

According to CMS data, Mary Callsen is affiliated with Johns Hopkins Hospital, The.

When was this NPI record last updated?

The NPPES record for Mary Callsen was last updated on January 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.