Shannon Gilliam, PA
NPI 1972548584 · Medical Physician Assistant · Waldorf, MD
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Shannon Gilliam, PA is a Medical Physician Assistant provider in Waldorf, MD (NPI 1972548584).
Provider details
- NPI number
- 1972548584
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- C0003161 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
144 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 51 | $191 |
| Critical Care, Each Additional 30 Minutes99292 | 41 | $97 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 34 | $105 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 18 | $156 |
Typical Medicare-allowed amounts for these services range $97–$191 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$138 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1500 Forest Glen RdHoly Corss HospitalSilver Spring, MD 20910-1483Phone: (301) 754-7000
Registry dates
- Enumerated
- 2006-06-18
- Last updated
- 2020-02-24
- Certified
- 2020-02-24
Frequently asked questions
- What is Shannon Gilliam's NPI number?
- Shannon Gilliam's National Provider Identifier (NPI) is 1972548584, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Shannon Gilliam's specialty?
- Shannon Gilliam is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Shannon Gilliam located?
- Shannon Gilliam's practice location on file with NPPES is 12070 Old Line Ctr Ste 303, Waldorf, MD 20602-3535.
- What is Shannon Gilliam's phone number?
- The practice phone number listed in the NPPES registry for Shannon Gilliam is (301) 893-2505.
- Does Shannon Gilliam accept Medicare?
- Shannon Gilliam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Shannon Gilliam's NPI active?
- Yes — Shannon Gilliam's NPI (1972548584) is active in the NPPES registry as of the last update on 2020-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.