Ruth Hwang, MS, PA-C
NPI 1821332156 · Physician Assistant · Fullerton, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruth Hwang, MS, PA-C is a Physician Assistant provider in Fullerton, CA (NPI 1821332156).
Provider details
- NPI number
- 1821332156
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MS, PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 5211 (AZ)
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
13 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
429 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 216 | $118 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 105 | $31 |
| 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 | 95 | $15 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 13 | $152 |
Typical Medicare-allowed amounts for these services range $15–$152 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 170 | 44 |
| Tirzepatidebrand: Mounjaro | 110 | 18 |
| Dapagliflozin Propanediolbrand: Farxiga | 103 | 23 |
| Levothyroxine Sodium | 91 | 24 |
| Metformin Hcl | 81 | 30 |
| Metformin Hclbrand: Metformin Hcl Er | 80 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,543 across 43 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)
- 12020 S Warner Elliot Loop Ste 101Phoenix, AZ 85044-2712Phone: (480) 751-1900
Registry dates
- Enumerated
- 2012-11-27
- Last updated
- 2020-10-19
- Certified
- 2020-10-19
Frequently asked questions
- What is Ruth Hwang's NPI number?
- Ruth Hwang's National Provider Identifier (NPI) is 1821332156, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruth Hwang's specialty?
- Ruth Hwang is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ruth Hwang located?
- Ruth Hwang's practice location on file with NPPES is 100 E Valencia Mesa Dr Ste 105, Fullerton, CA 92835-3816.
- What is Ruth Hwang's phone number?
- The practice phone number listed in the NPPES registry for Ruth Hwang is (714) 449-4950.
- Does Ruth Hwang accept Medicare?
- Ruth Hwang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruth Hwang's NPI active?
- Yes — Ruth Hwang's NPI (1821332156) is active in the NPPES registry as of the last update on 2020-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.