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2026 NPPES data Surgical Physician Assistant NPI 1447879317 PA-C
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Calen Harding, PA-C

Surgical Physician Assistant in Tucson, Arizona.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,380 in Surgical Physician Assistant, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
235
Medicare Part D claims · 97 beneficiaries · Surgical Physician Assistant avg: 341
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
97.8/100
▲ 14 pts above national avg 83.5 · Exceptional
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Calen Harding, PA-C reported a CMS MIPS final score of 97.8/100 - above the 83.5 national average - and filed 235 Medicare Part D claims in 2024.

97.8/100
MIPS score · +14 vs avg
235
Part D claims, 2024
91%
generic prescribing
≥84th
pct among measured MIPS (lower-bound band)

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.

Federal trust snapshot

What official records show about Calen Harding, PA-C

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1447879317), first enumerated 04/10/2020.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 235 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 97.8/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Hospital affiliations

    2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.

    Source: CMS Care Compare

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1447879317 · Surgical Physician Assistant

NPI-10 · ENUM-RECENT · TAX-MID · MIPS-ELITE · RX-LIGHT · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1447879317
  • ENUM-RECENT 2020
  • TAX-MID 16K Surgical Physician
  • MIPS-ELITE 97.8/100
  • RX-LIGHT 235
  • BOOK-THIN 444 in Arizona
  • PHOTO-FINISH Krupa Andalkar · ±0.1

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Calen Harding, PA-C's MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

98 ≥ 84th percentile 84% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

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

Where Calen Harding, PA-C sits

This provider among surgical physician assistant peers

Across the 3,657 surgical physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Calen Harding, PA-C writes more Part D claims than 66% of them and scores higher on MIPS quality than 89% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 38Calen Harding, PA-C, Part D claim volume, percentile in specialty: 66 · MIPS quality, percentile: 89
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one surgical physician assistant peer from a representative sample of 60; the gold marker is Calen Harding, PA-C. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

What does the federal data show about Calen Harding, PA-C?

High performer (top quartile)

NPI registry status

Active

Issued 04/10/2020

NPI 1447879317

Primary specialty

Surgical Physician Assistant

Mid-sized

16,380 US NPIs in this specialty

Medicare Part D claims

235 31% vs specialty avg

2024 prescription claims

Specialty avg: 341

MIPS final score

97.8/100 14.3 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Arizona

How Surgical Physician Assistant compares to other specialties among Arizona providers

Arizona providers
Behavior Technician6%Pharmacist5.4%Family Nurse Practitioner4.3%Physical Therapist4.1%Student in an Organized Heal…3.6%Speech-Language Pathologist3.5%Surgical Physician Assistant0.4%
Largest specialties in Arizona (% of in-state providers)

Medicare quality performance, MIPS

Calen Harding, PA-C's 2023 MIPS final score plotted against the Surgical Physician Assistant national average

High performer (top quartile)
MIPS Final Score
97.8/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%97.8%
MIPS final score (Surgical Physician Assistant) - 97.8/100 vs national avg 83.5
How MIPS and board certification work

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).

Practice Address

5301 E GRANT RD
Tucson, AZ 85712
(520) 324-1922

Provider Details

NPI 1447879317
Specialty Surgical Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 04/10/2020

CMS Quality Score (MIPS)

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

97.7583
Final Score
Measured-score avg: 83.5
100
Quality
92.5277
Cost

Reporting: Group practice

Hospital and facility affiliations

Facilities where Calen Harding, PA-C bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

Connections Southernaz, LLC
Tucson, AZ
EL Rio Santa Cruz Neighborhood Health Center, Inc.
Tucson, AZ

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Generic-heavy

Calen Harding, PA-C - brand share 9.0%
Surgical Physician Assistant average

9% brand-name claims vs 91% generic, on 235 2024 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2024.

235
Total Claims
$9K
Total Drug Cost
97
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
237.5
Total Day Supply
3,548
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$7K
Generic Drug Cost
$2K
Antibiotic Claims
54

Patient Demographics

Average Patient Age
77.1 years
Avg HCC Risk Score
1.80
Gender Split
63% female / 37% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

Drug Claims
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
13

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

More Surgical Physician Assistant in AZ → All providers in Arizona → Compare specialties →

Surgical Physician Assistant Overview

How Calen Harding, PA-C fits within the Surgical Physician Assistant landscape nationally.

16,380
Surgical Physician Assistant Providers in US
54
States with Surgical Physician Assistant
341
Avg Claims per Provider

Calen Harding, PA-C's 235 claims are below the specialty average of 341.

Nationwide Surgical Physician Assistant peers with similar MIPS or enrollment year

Two federal-record peer sets for Harding, both outside Arizona so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (97.8 here).

Krupa Andalkar 97.7 IL Sydney Aronson 97.7 CO Moshe Bedziner 97.7 IL Amanda Burress 97.7 IL

Same NPPES enumeration year (2020)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Jamie Schroff Olympia, WA Blaine Brown Greensboro, NC Rylee Northeim Sandusky, OH Alexandra Jureller Boston, MA

Nearby Surgical Physician Assistant Providers in Arizona

Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Harding.

One of 444 Surgical Physician Assistant providers enrolled in Arizona, 5 are shown here.

Christopher Adams
PA
Tucson, AZ
Franchesca Alexander
P.A.-C
Mesa, AZ
Regan Alford
PAC
Phoenix, AZ
Dr. Aaron Allen
MD, SA-C
Gilbert, AZ
Diana Allen
PA-C
Tucson, AZ

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

Frequently Asked Questions

What is Calen Harding, PA-C's specialty? ▼
Calen Harding, PA-C specializes in Surgical Physician Assistant and practices in Tucson, Arizona. Credentials: PA-C.
How much does Calen Harding, PA-C prescribe under Medicare Part D? ▼
In 2024, Calen Harding, PA-C wrote 235 Medicare Part D claims totaling $9K in drug costs for 97 beneficiaries.
What is Calen Harding, PA-C's Medicare quality score? ▼
Calen Harding, PA-C has a CMS MIPS Final Score of 97.8/100 (Quality: 100, Cost: 92.5). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Calen Harding, PA-C located? ▼
Calen Harding, PA-C is located at 5301 E GRANT RD, Tucson, AZ, 85712. Phone: (520) 324-1922.
What is Calen Harding, PA-C's NPI number? ▼
Calen Harding, PA-C's National Provider Identifier (NPI) is 1447879317, issued on 04/10/2020.
Does Calen Harding, PA-C prescribe more brand-name or generic drugs? ▼
Calen Harding, PA-C's prescribing is 9% brand-name and 91% generic drugs by claim count, with $7K in brand drug costs.
How many Surgical Physician Assistant providers are there in the US? ▼
There are 16,380 Surgical Physician Assistant providers across 54 states in the US. The average Surgical Physician Assistant provider writes 341 Medicare Part D claims per year.
What drugs does Calen Harding, PA-C prescribe most often? ▼
Based on 2024 Medicare Part D data, Calen Harding, PA-C's most frequently prescribed drugs include Amoxicillin-Clavulanate Potass. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Calen Harding, PA-C accept Medicare? ▼
Calen Harding, PA-C appears in CMS Medicare data with 235 Part D claims and 97 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Calen Harding, PA-C's credentials? ▼
Calen Harding, PA-C's NPI is 1447879317 with credentials 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

View source datasets and methodology notes
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 (2024). 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 August 2026 (NPPES) / 2024 (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

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.