Louisa Ziglar, MD
NPI 1538336151 · Rheumatology Physician · Frederick, MD
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louisa Ziglar, MD is a Rheumatology Physician provider in Frederick, MD (NPI 1538336151).
Provider details
- NPI number
- 1538336151
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- D80134 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
8,297 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 1,333 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,001 | $132 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 866 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 824 | $10 |
| Measurement C-Reactive Protein for Detection of Infection Or Inflammation86140 | 560 | $5 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 267 | 83 |
| Hydroxychloroquine Sulfate | 209 | 63 |
| Prednisone | 207 | 77 |
| Alendronate Sodium | 205 | 81 |
| Tramadol Hcl | 70 | 22 |
| Duloxetine Hcl | 58 | 22 |
| Leucovorin Calcium | 49 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$194 across 5 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)
- 14995 Shady Grove Rd Ste 500Rockville, MD 20850-8726Phone: (301) 942-7600Fax: (301) 774-1799
Registry dates
- Enumerated
- 2008-05-13
- Last updated
- 2026-02-05
- Certified
- 2026-02-05
Frequently asked questions
- What is Louisa Ziglar's NPI number?
- Louisa Ziglar's National Provider Identifier (NPI) is 1538336151, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louisa Ziglar's specialty?
- Louisa Ziglar is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Louisa Ziglar located?
- Louisa Ziglar's practice location on file with NPPES is 161 Thomas Johnson Dr Ste 250, Frederick, MD 21702-4958.
- What is Louisa Ziglar's phone number?
- The practice phone number listed in the NPPES registry for Louisa Ziglar is (301) 942-7600.
- Does Louisa Ziglar accept Medicare?
- Louisa Ziglar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louisa Ziglar's NPI active?
- Yes — Louisa Ziglar's NPI (1538336151) is active in the NPPES registry as of the last update on 2026-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.