ST AGNES HEALTHCARE INC
NPI 1144250176
Internal Medicine in Baltimore, MD

Q: What is St Agnes Healthcare Inc's NPI number?

The NPI number for St Agnes Healthcare Inc is 1144250176. It was assigned to this organization in the NPPES registry on July 4, 2006. The provider is doing business as Integrated Specialists Group.

Q: What is St Agnes Healthcare Inc's specialty?

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

Active since July 04, 2006

900 CATON AVE, BALTIMORE, MD 21229(667) 234-2149(667) 234-8644 Get Directions Write a Review

NPPES record last updated: June 2, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 2, 2025, Feb 25, 2016, Jan 14, 2016 (3 updates tracked since 2016).

On this page

About St Agnes Healthcare Inc NPPES

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

ST AGNES HEALTHCARE INC (NPI 1144250176), doing business as Integrated Specialists Group, is a healthcare organization registered as an internal medicine in Baltimore, Maryland and active in the NPI registry since July 2006. The organization lists William B Higginbotham, President/ceo, as its authorized official.

NPPES Registry Identity

NPI1144250176

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameST AGNES HEALTHCARE INC

Location Address900 CATON AVEBaltimore, MD 21229-5201

Mailing Address3585 Washington BlvdHalethorpe, MD 21227-1676 · (667) 234-2149 · Fax (667) 234-8644

Phone(667) 234-2149

Fax(667) 234-8644

Organization SubpartYesParent: St Agnes Healthcare Inc

Authorized OfficialWilliam B HigginbothamPresident/ceo · (667) 234-3162

Enumeration DateJuly 4, 2006

Last NPPES UpdateJune 2, 20253 updates tracked since enumeration

NPPES CertifiedJune 2, 2025

✔ NPI 1144250176 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 15

★ 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.

Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X

Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X

Also ListedInternal Medicine · Endocrinology, Diabetes & MetabolismTaxonomy 207RE0101X

Also ListedInternal Medicine · Medical OncologyTaxonomy 207RX0202X

Also ListedObstetrics & GynecologyTaxonomy 207V00000X

Also ListedObstetrics & Gynecology · Maternal & Fetal MedicineTaxonomy 207VM0101X

Also ListedOrthopaedic SurgeryTaxonomy 207X00000X

Also ListedPediatricsTaxonomy 208000000X

Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X

Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X

Also ListedSurgeryTaxonomy 208600000X

Also ListedHospitalistTaxonomy 208M00000X

Also ListedPhysician AssistantTaxonomy 363A00000X

Also ListedNurse PractitionerTaxonomy 363L00000X

900 CATON AVE, Baltimore, MD 21229

Open in Google Maps ↗

Other Names 1

Doing Business AsIntegrated Specialists Group

Other Identifiers 2

Medicaid216121400MD

OtherW662MD · Carefirst Bcbs

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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company).Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

St Agnes Healthcare Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by January 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date

StateMarylandEnrollment IDO20040128001146Non-DME Part B · Clinic/Group PracticeDue dateJanuary 31, 2027

Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

396

Medicare enrollment records show 396 clinicians reassign Medicare billing to St Agnes Healthcare Inc, which bills Medicare for the services they deliver. Of these, 7 practice at this address and 189 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 37

Diagnostic Radiology60

Internal Medicine42

Obstetrics/Gynecology42

Nurse Practitioner41

Psychiatry31

Cardiovascular Disease (Cardiology)23

Critical Care (Intensivists)19

General Surgery19

29 other specialties119

Nearest to this location (20)

See all 396

Shamsaad Ali, DO

Internal Medicine

NPI 1962653360

900 CATON AVE
Baltimore, MD 21229

(410) 368-3120

✔ PECOS✔ Accepts MedicareSame address

Neleen Bonilla, CRNP

Nurse Practitioner

NPI 1760879738

900 CATON AVENUE, MAILBOX 009
Baltimore, MD 21229

(667) 234-8912

✔ PECOS✔ Accepts MedicareSame address

Christopher Kim, M.D.

Gastroenterology

NPI 1922006931

900 S CATON AVE
Baltimore, MD 21229

(667) 234-2200

✔ PECOS✔ Accepts MedicareSame address

Shaha Nabeel

Medical Oncology

NPI 1023514916

900 CATON AVE
Baltimore, MD 21229

(667) 234-2149

✔ PECOS✔ Accepts MedicareSame address

Hyesung Pease

Nurse Practitioner

NPI 1104226505

900 S CATON AVE
Baltimore, MD 21229

(667) 234-2000

✔ PECOS✔ Accepts MedicareSame address

Alexander Cezar Reyes, MD

Internal Medicine

NPI 1225762909

900 S CATON AVE
Baltimore, MD 21229

(667) 234-3120

✔ PECOS✔ Accepts MedicareSame address

Imran Siddiqui

Diagnostic Radiology

NPI 1750743787

900 S CATON AVE
Baltimore, MD 21229

(667) 234-6000

✔ PECOS✔ Accepts MedicareSame address

Heidi Abdelhady, M.D.

Critical Care (Intensivists)

NPI 1437106481

900 CATON AVE
Baltimore, MD 21229

(410) 368-3235

✔ PECOS✔ Accepts Medicare0.1 mi

Mustafa Abdulmahdi, M.D.

Internal Medicine

NPI 1205278843

900 CATON AVE MAILBOX 198
Baltimore, MD 21229

(410) 368-8858

✔ PECOS✔ Accepts Medicare0.1 mi

Khaleel Ahmed, M.D

Hospitalist

NPI 1588783286

900 CATON AVE
Baltimore, MD 21229

(667) 234-3120

✔ PECOS✔ Accepts Medicare0.1 mi

Saira Ahmed, MD

Medical Oncology

NPI 1932393766

900 S CATON AVE
Baltimore, MD 21229

(667) 234-2910

✔ PECOS✔ Accepts Medicare0.1 mi

Shadi Barakat, MD

Endocrinology

NPI 1629250154

900 CATON AVE
Baltimore, MD 21229

(667) 234-2391

✔ PECOS✔ Accepts Medicare0.1 mi

Sylwester Dziuba, MD

Radiation Oncology

NPI 1841291978

900 CATON AVE
Baltimore, MD 21229

(410) 368-2965

✔ PECOS✔ Accepts Medicare0.1 mi

Ayad Hatoum, M.D

Obstetrics/Gynecology

NPI 1578604351

900 CATON AVE
Baltimore, MD 21229

(410) 368-2600

✔ PECOS✔ Accepts Medicare0.1 mi

Abhishek Kalla, M.D.

Hematology/Oncology

NPI 1508085887

900 CATON AVE
Baltimore, MD 21229

(667) 234-2910

✔ PECOS✔ Accepts Medicare0.1 mi

Susan Kelly, NNP

Nurse Practitioner

NPI 1679114581

900 S CATON AVE
Baltimore, MD 21229

(667) 234-6000

✔ PECOS0.1 mi

Manoj Regmi

Psychiatry

NPI 1891131017

900 CATON AVE
Baltimore, MD 21229

(667) 234-3577

✔ PECOS0.1 mi

James Richardson, M.D., M.P.H.

Geriatric Medicine

NPI 1336217819

900 CATON AVE DEPARTMENT OF MEDICINE, SIXTH FLOOR
Baltimore, MD 21229

(410) 368-8979

✔ PECOS0.1 mi

Asgar Saleem, MD

Diagnostic Radiology

NPI 1699855130

900 CATON AVE BOX 234 DIAGNOSTIC IMAGING
Baltimore, MD 21229

(410) 368-3009

✔ PECOS✔ Accepts Medicare0.1 mi

Ahmad Ahad, M.D.

General Surgery

NPI 1073737615

3407 WILKENS AVE STE 410
Baltimore, MD 21229

(443) 574-8500

✔ PECOS✔ Accepts Medicare0.1 mi

See all 396 clinicians

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

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 St Agnes Healthcare Inc's NPI number?

The NPI number for St Agnes Healthcare Inc is 1144250176. It was assigned to this organization in the NPPES registry on July 4, 2006. The provider is doing business as Integrated Specialists Group.

Where is St Agnes Healthcare Inc located?

St Agnes Healthcare Inc is located at 900 Caton Ave, Baltimore, MD 21229. The listed phone number is (667) 234-2149.

What is St Agnes Healthcare Inc's specialty?

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

Is St Agnes Healthcare Inc enrolled in Medicare?

Yes. St Agnes Healthcare Inc is registered in the Medicare PECOS enrollment system.

When is St Agnes Healthcare Inc's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Maryland, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through St Agnes Healthcare Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 396 clinicians in 37 Medicare specialties reassign their Medicare billing to St Agnes Healthcare Inc. 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 Diagnostic Radiology (60), Internal Medicine (42) and Obstetrics/Gynecology (42). Of these, 7 practice at this address and 189 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does St Agnes Healthcare Inc accept?

Health plans from Florida Blue (BlueCross BlueShield FL) and Florida Blue HMO (a BlueCross BlueShield FL company) list St Agnes Healthcare Inc 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.

When was this NPI record last updated?

The NPPES record for St Agnes Healthcare Inc was last updated on June 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.