Karen Diaz, PA-C
NPI 1639602147 · Physician Assistant · Pasadena, MD
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Diaz, PA-C is a Physician Assistant provider in Pasadena, MD (NPI 1639602147).
Provider details
- NPI number
- 1639602147
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- C0006431 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
600 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 121 | $122 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 81 | $155 |
| X-Ray of Chest, 2 Views71046 | 50 | $26 |
| Automated Urinalysis Test81003 | 48 | $2 |
| Detection Test By Nucleic Acid for Strep (streptococcus, Group A), Amplified Probe Technique87651 | 39 | $34 |
| Detection Test By Multiplex Amplified Probe Technique for Severe Acute Respiratory Syndrome Coronavirus 2 (sars-Cov-2) (covid-19), Influenza Virus Types a and B, and Respiratory Syncytial Virus87637 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone Propionate | 36 | 36 |
| Doxycycline Hyclate | 23 | 23 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 17 | 17 |
| Methylprednisolone | 17 | 17 |
| Prednisone | 15 | 14 |
| Cephalexin | 13 | 13 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 13 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-04-11
- Last updated
- 2017-04-11
Frequently asked questions
- What is Karen Diaz's NPI number?
- Karen Diaz's National Provider Identifier (NPI) is 1639602147, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Diaz's specialty?
- Karen Diaz is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Diaz located?
- Karen Diaz's practice location on file with NPPES is 33 Magothy Beach Rd, Pasadena, MD 21122-4413.
- What is Karen Diaz's phone number?
- The practice phone number listed in the NPPES registry for Karen Diaz is (410) 983-3070.
- Does Karen Diaz accept Medicare?
- Karen Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Diaz's NPI active?
- Yes — Karen Diaz's NPI (1639602147) is active in the NPPES registry as of the last update on 2017-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.