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CALVERT INTERNAL MEDICINE GROUP PA
NPI 1174682298
Internal Medicine in Prince Frederick, MD

Active since December 06, 2006CLIA Certified · 5 labs
985 PRINCE FREDERICK BLVD STE 201, PRINCE FREDERICK, MD 20678(410) 535-2005(410) 535-4761 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Sep 18, 2017, Nov 15, 2016 (3 updates tracked since 2016).

About Calvert Internal Medicine Group Pa NPPES

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

CALVERT INTERNAL MEDICINE GROUP PA (NPI 1174682298) is a healthcare organization registered as an internal medicine in Prince Frederick, Maryland and active in the NPI registry since December 2006. The organization holds 5 active CLIA laboratory certificates and lists Jonathan Lowenthal, President, as its authorized official.

NPPES Registry Identity

NPI1174682298
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameCALVERT INTERNAL MEDICINE GROUP PA
Location Address985 PRINCE FREDERICK BLVD STE 201Prince Frederick, MD 20678-3492
Mailing Address985 Prince Frederick Blvd, Suite 201Prince Frederick, MD 20678-3492 · (410) 535-2005 · Fax (410) 535-4850
Phone(410) 535-2005
Fax(410) 535-4761
Organization SubpartNo
Authorized OfficialJonathan LowenthalPresident · (410) 535-2005
Enumeration DateDecember 6, 2006
Last NPPES UpdateJuly 21, 20223 updates tracked since enumeration
✔ NPI 1174682298 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
985 PRINCE FREDERICK BLVD STE 201, Prince Frederick, MD 20678
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Other Identifiers 3

OtherC041DC · Carefirst Of Dc
Medicaid256411400MD
OtherKB03MD · Carefirst Of Md

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Calvert Internal Medicine Group Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

32

Medicare enrollment records show 32 clinicians reassign Medicare billing to Calvert Internal Medicine Group PA, which bills Medicare for the services they deliver. Of these, 18 practice at this address and 27 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 11

Nurse Practitioner11
Internal Medicine9
Cardiovascular Disease (Cardiology)2
Gastroenterology2
Mental Health Counselor2
Endocrinology1
Family Practice1
Infectious Disease1
3 other specialties3

Nearest to this location (20)

See all 32
Eric Berg, M.D.
Internal Medicine
NPI 1346315157
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Elizabeth Bissett, CRNP
Nurse Practitioner
NPI 1982097473
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Mary Cho, DNP, NP-C, AE-C
Nurse Practitioner
NPI 1326691916
985 PRINCE FREDERICK BLVD SUITE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Tiffany Gaines, CRNP
Nurse Practitioner
NPI 1881617587
985 PRINCE FREDERICK BLVD SUITE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Brendan Glowacki, FNP-BC, CRNP-FAMILY
Nurse Practitioner
NPI 1871148973
985 PRINCE FREDERICK BLVD SUITE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Jonathan Lowenthal, MD
Internal Medicine
NPI 1861553711
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Alison Massey, MS, RD, CDCES
Registered Dietitian or Nutrition Professional
NPI 1649502451
985 PRINCE FREDERICK BLVD SUITE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ Accepts MedicareSame address
Julie Okeefe, MD
Endocrinology
NPI 1013078880
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Ramin Pirouz, MD
Pulmonary Disease
NPI 1285860700
985 PRINCE FREDERICK BLVD SUITE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Paul Pomilla, MD
Infectious Disease
NPI 1467501114
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Jacquelyn Wallander, DNP CRNP
Nurse Practitioner
NPI 1063180792
985 PRINCE FREDERICK BLVD SUITE 201
Prince Frederick, MD 20678
(410) 414-5329
✔ PECOS✔ Accepts MedicareSame address
Tessa Washington, LCPC
Mental Health Counselor
NPI 1316584733
985 PRINCE FREDERICK BLVD SUITE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Paul Kline, MD
Family Practice
NPI 1114375607
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Peter Wisniewski, MD
Internal Medicine
NPI 1922157593
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Makenzie Griffin, FNP
Nurse Practitioner
NPI 1093209645
985 PRINCE FREDERICK BLVD SUITE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Michelle Morris-Deal, LCPC
Mental Health Counselor
NPI 1679467245
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOSSame address
Nayantara Mendonca, MD
Internal Medicine
NPI 1952453359
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Dolores Rhodes-Height, MD
Gastroenterology
NPI 1558310698
985 PRINCE FREDERICK BLVD STE 201
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts MedicareSame address
Joseph Barth, MD
Internal Medicine
NPI 1164571741
110 HOSPITAL RD STE 310
Prince Frederick, MD 20678
(410) 535-2005
✔ PECOS✔ Accepts Medicare0.4 mi
Cassius Belfonte, MD
Cardiovascular Disease (Cardiology)
NPI 1093978322
110 HOSPITAL RD SUITE 306
Prince Frederick, MD 20678
(410) 414-6559
✔ PECOS✔ Accepts Medicare0.4 mi
See all 32 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA 5

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Accreditation 21D0689728

Calvert Internal Medicine Group · Prince Frederick, MD
Active · expires May 18, 2028
CLIA Number21D0689728
Laboratory TypePhysician Office
Certificate Effective DateMay 19, 2026
Certificate Expiration DateMay 18, 2028
Laboratory DirectorDr. Paul Pomilla
Laboratory Phone(410) 535-2005
Laboratory LocationCalvert Internal Medicine Group985 Prince Frederick Boulevard Suite 201, Prince Frederick, MD 20678
CLIA data matches this NPI record on: Address Name Phone
This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 21D0209666

Calvert Internal Medicine Group PA · Prince Frederick, MD
Active · expires Apr 11, 2027
CLIA Number21D0209666
Laboratory TypePhysician Office
Certificate Effective DateApril 12, 2025
Certificate Expiration DateApril 11, 2027
Laboratory DirectorDr. Paul V. Pomilla
Laboratory Phone(301) 535-2005
Laboratory LocationCalvert Internal Medicine Group PA985 Prince Frederick Blvd Suite 201, Prince Frederick, MD 20678
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

Certificate of Waiver 21D2330835

Calvert Internal Medicine Group Dunkirk Expansion · Dunkirk, MD
Active · expires Sep 22, 2027
CLIA Number21D2330835
Laboratory TypePhysician Office
Certificate Effective DateSeptember 23, 2025
Certificate Expiration DateSeptember 22, 2027
Laboratory DirectorDr. Paul V. Pomilla
Laboratory Phone(410) 535-2005
Laboratory LocationCalvert Internal Medicine Group Dunkirk Expansion10845 Town Center Blvd #203, Dunkirk, MD 20754
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 21D1097216

Calvert Internal Medicine Group · Prince Frederick, MD
Active · expires Mar 19, 2027
CLIA Number21D1097216
Laboratory TypePhysician Office
Certificate Effective DateMarch 20, 2025
Certificate Expiration DateMarch 19, 2027
Laboratory DirectorDr. Paul V. Pomilla
Laboratory Phone(410) 535-2005
Laboratory LocationCalvert Internal Medicine Group110 Hospital Rd Ste 303, Prince Frederick, MD 20678
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

Certificate for Provider-Performed Microscopy Procedures (PPMP) 21D2015354

Calvert Internal Medicine Group · Dunkirk, MD
Active · expires Oct 25, 2026
CLIA Number21D2015354
Laboratory TypePhysician Office
Certificate Effective DateOctober 26, 2024
Certificate Expiration DateOctober 25, 2026
Laboratory DirectorDr. Paul V. Pomilla
Laboratory Phone(410) 535-2005
Laboratory LocationCalvert Internal Medicine Group10845 Town Center Boulevard Suite 204, Dunkirk, MD 20754
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform waived tests.

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 Calvert Internal Medicine Group PA's NPI number?

The NPI number for Calvert Internal Medicine Group PA is 1174682298. It was assigned to this organization in the NPPES registry on December 6, 2006.

Where is Calvert Internal Medicine Group PA located?

Calvert Internal Medicine Group PA is located at 985 Prince Frederick Blvd Ste 201, Prince Frederick, MD 20678. The listed phone number is (410) 535-2005.

What is Calvert Internal Medicine Group PA's specialty?

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

Is Calvert Internal Medicine Group PA enrolled in Medicare?

Yes. Calvert Internal Medicine Group PA is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Calvert Internal Medicine Group PA?

According to the CMS Revalidation Reassignment List (October 2026 release), 32 clinicians in 11 Medicare specialties reassign their Medicare billing to Calvert Internal Medicine Group PA. A 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 the clinician's services. The largest specialties are Nurse Practitioner (11), Internal Medicine (9) and Cardiovascular Disease (Cardiology) (2). Of these, 18 practice at this address and 27 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Calvert Internal Medicine Group PA hold CLIA laboratory certificates?

Yes. 5 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

When was this NPI record last updated?

The NPPES record for Calvert Internal Medicine Group PA was last updated on July 21, 2022. 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.