SHANNON L GILLIAM PA
NPI 1972548584
Physician Assistant - Medical in Waldorf, MD

Q: What is Shannon Gilliam's NPI number?

The NPI number for Shannon Gilliam is 1972548584. It was assigned to this individual provider in the NPPES registry on June 18, 2006. The provider is also known as Shannon L Zimmerman.

Q: What is Shannon Gilliam's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Q: When was this NPI record last updated?

The NPPES record for Shannon Gilliam was last updated on February 24, 2020. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since June 18, 2006PECOS EnrolledAccepts Medicare Assignment

12070 OLD LINE CTR STE 303, WALDORF, MD 20602(301) 893-2505 Get Directions Write a Review

NPPES record last updated: February 24, 2020. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Feb 24, 2020, Jun 18, 2019 (2 updates tracked since 2019).

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About Shannon L Gilliam Pa NPPES

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

SHANNON L GILLIAM PA (NPI 1972548584) is an individual medical provider in Waldorf, Maryland, licensed in Maryland (C0003161) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Holy Cross Hospital, and maintains a secondary practice location in Silver Spring.

NPPES Registry Identity

NPI1972548584

Entity TypeIndividualFemale

Primary Taxonomy363AM0700X

Provider Legal NameSHANNON L GILLIAMCredential: PA

Location Address12070 OLD LINE CTR STE 303Waldorf, MD 20602-3535

Mailing Address37855 Waterloo RdColtons Point, MD 20626-2102 · (571) 215-2155

Phone(301) 893-2505

Sole ProprietorNo

Medical School CMSOtherGraduated 2003

Enumeration DateJune 18, 2006

Last NPPES UpdateFebruary 24, 20202 updates tracked since enumeration

✔ NPI 1972548584 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AM0700X

License✔ Licensed in MD · C0003161

12070 OLD LINE CTR STE 303, Waldorf, MD 20602

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Other Names 1

Former Name (1)Shannon L Zimmerman

Secondary Practice Location 1

Location 11500 Forest Glen Rd, Holy Corss HospitalSilver Spring, MD 20910-1483 · Phone (301) 754-7000 ext. 4284

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

Shannon L Gilliam Pa 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 ID42220014

PECOS Enrollment IDI20060504000697

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 4

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.

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.

51 services35 patients

Critical care, each additional 30 minutes 99292

Critical care refers to special attention given to patients facing life-threatening conditions. Each additional 30 minutes indicates the extension of this specialized care. This might include close monitoring, medication adjustments, and immediate interventions as needed.

41 services25 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.

34 services27 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.

18 services18 patients

Hospital Affiliations CMS Care Compare

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

Holy Cross Hospital

Acute Care Hospitals · Silver Spring, MD

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number210004

Location1500 Forest Glen RoadSilver Spring, MD 20910 · Montgomery County

Birthing friendly

Other Providers at the Same Location NPPES 5

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

DR. SAMUEL B ITSCOITZ MD

Internal Medicine (Cardiovascular Disease)