2026 NPPES data Physician Assistant NPI 1578030961 MMS, PA-C
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JULIA LINK-HERRERA, MMS, PA-C

Physician Assistant in MARYSVILLE, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
48
Medicare Part D claims · 26 beneficiaries · Physician Assistant avg: 790
MIPS score
94.6267/100
▲ 12 pts above national avg 83.1 · [object Object]

What the federal data shows

JULIA LINK-HERRERA, MMS, PA-C reported a CMS MIPS final score of 94.6267/100 — above the 83.1 national average — and filed 48 Medicare Part D claims in 2023.

94.6267/100
MIPS score · +12 vs avg
48
Part D claims, 2023

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

JULIA LINK-HERRERA, MMS, PA-C's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

95 Top 25% higher than 75% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

What does the federal data show about JULIA LINK-HERRERA, MMS, PA-C?

High performer (top quartile)

NPI registry status

Active

Issued 10/24/2018

NPI 1578030961

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

48 94% vs specialty avg

2023 prescription claims

Specialty avg: 790

MIPS final score

94.6267/100 11.526700000000005% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in California

How Physician Assistant compares to other specialties among California providers

California providers

Physician Assistant share within California

1. Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physician Assistant share within California

Medicare quality performance — MIPS

JULIA LINK-HERRERA, MMS, PA-C's 2023 MIPS final score plotted against the Physician Assistant national average

High performer (top quartile)
MIPS Final Score
94.6267/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Physician Assistant) — 94.6267/100 vs national avg 83.1

0%100%National avg83%94.6%
MIPS final score (Physician Assistant) — 94.6267/100 vs national avg 83.1

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

JULIA LINK-HERRERA, MMS, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding MMS, PA-C credentials at 726 4TH ST, MARYSVILLE, CA, 95901, with a listed phone of (805) 689-1438. NPI 1578030961 was issued on 10/24/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LINK-HERRERA most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 48 prescription claims written by this provider, covering 26 Medicare beneficiaries and totaling roughly $3K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 94.6267/100 for the 2023 performance year (Quality 76.6789, Cost 97.1443), compared with the national average of 83.1.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

726 4TH ST
MARYSVILLE, CA 95901

Provider Details

NPI 1578030961
Specialty Physician Assistant
Credentials MMS, PA-C
Gender Female
NPI Issued 10/24/2018

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

94.6267
Final Score
Avg: 83.1
76.6789
Quality
97.1443
Cost

Reporting: Group practice

License & disciplinary context — California MBC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 — they are NOT specific to JULIA LINK-HERRERA, MMS, PA-C. To verify JULIA LINK-HERRERA, MMS, PA-C's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

48
Total Claims
$3K
Total Drug Cost
26
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
48
Total Day Supply
689
Generic Drug Cost
$363
Antibiotic Claims
13

Patient Demographics

Average Patient Age
69.7 years
Avg HCC Risk Score
1.66
Gender Split
54% female / 46% male

Physician Assistant Overview

How JULIA LINK-HERRERA, MMS, PA-C fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

JULIA LINK-HERRERA, MMS, PA-C's 48 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as LINK-HERRERA.

Compare Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is JULIA LINK-HERRERA, MMS, PA-C's specialty?
JULIA LINK-HERRERA, MMS, PA-C specializes in Physician Assistant and practices in MARYSVILLE, California. Credentials: MMS, PA-C.
How much does JULIA LINK-HERRERA, MMS, PA-C prescribe under Medicare Part D?
In 2023, JULIA LINK-HERRERA, MMS, PA-C wrote 48 Medicare Part D claims totaling $3K in drug costs for 26 beneficiaries.
What is JULIA LINK-HERRERA, MMS, PA-C's Medicare quality score?
JULIA LINK-HERRERA, MMS, PA-C has a CMS MIPS Final Score of 94.6267/100 (Quality: 76.6789, Cost: 97.1443). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is JULIA LINK-HERRERA, MMS, PA-C located?
JULIA LINK-HERRERA, MMS, PA-C is located at 726 4TH ST, MARYSVILLE, CA, 95901. Phone: (805) 689-1438.
What is JULIA LINK-HERRERA, MMS, PA-C's NPI number?
JULIA LINK-HERRERA, MMS, PA-C's National Provider Identifier (NPI) is 1578030961, issued on 10/24/2018.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
Does JULIA LINK-HERRERA, MMS, PA-C accept Medicare?
JULIA LINK-HERRERA, MMS, PA-C appears in CMS Medicare data with 48 Part D claims and 26 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JULIA LINK-HERRERA, MMS, PA-C's credentials?
JULIA LINK-HERRERA, MMS, PA-C's NPI is 1578030961 with credentials MMS, PA-C. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology