Melissa Clark, ARNP
NPI 1639681000 · Gerontology Nurse Practitioner · Concord, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Clark, ARNP is a Gerontology Nurse Practitioner provider in Concord, CA (NPI 1639681000).
Provider details
- NPI number
- 1639681000
- Entity type
- Individual
- Primary specialty
- Gerontology Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ARNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 95007947 (CA)
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
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
777 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 | 341 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 310 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 53 | $89 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 27 | $284 |
| Transitional Care Management Services for Problem of High Complexity99496 | 21 | $289 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older) |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sevelamer Carbonate | 67 | 31 |
| Sodium Zirconium Cyclosilicatebrand: Lokelma | 61 | 27 |
| Dapagliflozin Propanediolbrand: Farxiga | 52 | 15 |
| Carvedilol | 48 | 24 |
| Lisinopril | 47 | 16 |
| Losartan Potassium | 44 | 24 |
| Furosemide | 29 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$528 across 25 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
Registry dates
- Enumerated
- 2017-10-25
- Last updated
- 2018-12-19
Frequently asked questions
- What is Melissa Clark's NPI number?
- Melissa Clark's National Provider Identifier (NPI) is 1639681000, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Clark's specialty?
- Melissa Clark is listed in the NPPES registry with a primary specialty of Gerontology Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Melissa Clark located?
- Melissa Clark's practice location on file with NPPES is 2222 East St Ste 305, Concord, CA 94520-2066.
- What is Melissa Clark's phone number?
- The practice phone number listed in the NPPES registry for Melissa Clark is (925) 686-1230.
- Does Melissa Clark accept Medicare?
- Melissa Clark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Clark's NPI active?
- Yes — Melissa Clark's NPI (1639681000) is active in the NPPES registry as of the last update on 2018-12-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.