Mark Okawachi, PA-C
NPI 1114078631 · Surgical Physician Assistant · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Okawachi, PA-C is a Surgical Physician Assistant provider in Walnut Creek, CA (NPI 1114078631).
Provider details
- NPI number
- 1114078631
- Entity type
- Individual
- Primary specialty
- Surgical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- Yes
- License
- C16009 (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 tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 193 | 160 |
| Ondansetronbrand: Ondansetron Odt | 133 | 126 |
| Omeprazole | 92 | 89 |
| Gabapentin | 31 | 21 |
| Enoxaparin Sodium | 28 | 26 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 20 | 14 |
| Meloxicam | 17 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-12
- Last updated
- 2022-02-11
Frequently asked questions
- What is Mark Okawachi's NPI number?
- Mark Okawachi's National Provider Identifier (NPI) is 1114078631, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Okawachi's specialty?
- Mark Okawachi is listed in the NPPES registry with a primary specialty of Surgical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Okawachi located?
- Mark Okawachi's practice location on file with NPPES is 1425 S Main St, Walnut Creek, CA 94596-5318.
- What is Mark Okawachi's phone number?
- The practice phone number listed in the NPPES registry for Mark Okawachi is (925) 295-4130.
- Does Mark Okawachi accept Medicare?
- Mark Okawachi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Okawachi's NPI active?
- Yes — Mark Okawachi's NPI (1114078631) is active in the NPPES registry as of the last update on 2022-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.