2026 NPPES data Physician Assistant NPI 1073079125 PA-C
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RILEY PHILLIPS, PA-C

Physician Assistant in HATTIESBURG, Mississippi. 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
802
Medicare Part D claims · 404 beneficiaries · Physician Assistant avg: 790
Generic prescribing
99%
generic claims · 1% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
56.2564/100
▼ 27 pts below national avg 83.1 · [object Object]
What the federal data reveals: RILEY PHILLIPS, PA-C is a Physician Assistant ([object Object]) practicing in HATTIESBURG, Mississippi with a Medicare Part D prescribing footprint of 802 claims across 404 beneficiaries — 1% brand-name prescribing . Their CMS MIPS Final Score of 56.2564/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: RILEY PHILLIPS, PA-C reported a CMS MIPS final score of 56.2564 out of 100, below the 83.1 national average, and filed 802 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

RILEY PHILLIPS, PA-C at a glance

Below national average

NPI registry status

Active

Issued 02/13/2019

NPI 1073079125

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

802 2% vs specialty avg

2023 prescription claims

Specialty avg: 790

MIPS final score

56.2564/100 26.843599999999995% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in Mississippi

How Physician Assistant compares to other specialties among Mississippi providers

Mississippi providers

Physician Assistant share within Mississippi

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

Medicare quality performance — MIPS

RILEY PHILLIPS, PA-C's 2023 MIPS final score plotted against the Physician Assistant national average

Below national average
MIPS Final Score
56.2564/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Physician Assistant) — 56.2564/100 vs national avg 83.1

0%100%National avg83%56.3%
MIPS final score (Physician Assistant) — 56.2564/100 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).

RILEY PHILLIPS, PA-C is a Physician Assistant provider practicing in HATTIESBURG, Mississippi, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1073079125. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

RILEY PHILLIPS, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 3688 VETERANS MEMORIAL DR, HATTIESBURG, MS, 39401, with a listed phone of (601) 554-7400. NPI 1073079125 was issued on 02/13/2019. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what PHILLIPS 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 802 prescription claims written by this provider, covering 404 Medicare beneficiaries and totaling roughly $8K in drug spend, split 1% brand-name and 99% generic by claim count, with an opioid prescribing rate of 6.1%. 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 56.2564/100 for the 2023 performance year (Quality 16.8583, Cost 63.1629), 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

3688 VETERANS MEMORIAL DR
HATTIESBURG, MS 39401

Provider Details

NPI 1073079125
Specialty Physician Assistant
Credentials PA-C
Gender Male
NPI Issued 02/13/2019

CMS Quality Score (MIPS)

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

56.2564
Final Score
Avg: 83.1
16.8583
Quality
63.1629
Cost
99
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where RILEY PHILLIPS, 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.

SOUTHERN BONE AND JOINT SPECIALISTS, PA
COLUMBIA, MS

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

RILEY PHILLIPS, PA-C — brand share 1.0%
Specialty average (est.)

1% brand-name claims vs 99% generic, on 802 2023 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 2023.

802
Total Claims
$8K
Total Drug Cost
404
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
822
Total Day Supply
15,551
Brand vs Generic
1% brand / 99% generic
Brand Drug Cost
$211
Generic Drug Cost
$8K
Opioid Claims
49 (6.1% rate)

Patient Demographics

Average Patient Age
70.3 years
Avg HCC Risk Score
1.06
Gender Split
59% female / 41% male
Age Distribution
<65: 73, 65-74: 192, 75-84: 126, 85+: 13

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Methylprednisolone
241
Gabapentin
154
Meloxicam
128
Diclofenac Sodium
108
Ketorolac Tromethamine
52
Tramadol Hcl
39
Pregabalin
25
Tizanidine Hcl
15
Diazepam
13

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

Physician Assistant Overview

How RILEY PHILLIPS, 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

RILEY PHILLIPS, PA-C's 802 claims are above the specialty average of 790.

Nearby Physician Assistant Providers in Mississippi

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

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

Frequently Asked Questions

What is RILEY PHILLIPS, PA-C's specialty?
RILEY PHILLIPS, PA-C specializes in Physician Assistant and practices in HATTIESBURG, Mississippi. Credentials: PA-C.
How much does RILEY PHILLIPS, PA-C prescribe under Medicare Part D?
In 2023, RILEY PHILLIPS, PA-C wrote 802 Medicare Part D claims totaling $8K in drug costs for 404 beneficiaries.
What is RILEY PHILLIPS, PA-C's Medicare quality score?
RILEY PHILLIPS, PA-C has a CMS MIPS Final Score of 56.2564/100 (Quality: 16.8583, Cost: 63.1629). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is RILEY PHILLIPS, PA-C located?
RILEY PHILLIPS, PA-C is located at 3688 VETERANS MEMORIAL DR, HATTIESBURG, MS, 39401. Phone: (601) 554-7400.
What is RILEY PHILLIPS, PA-C's NPI number?
RILEY PHILLIPS, PA-C's National Provider Identifier (NPI) is 1073079125, issued on 02/13/2019.
Does RILEY PHILLIPS, PA-C prescribe more brand-name or generic drugs?
RILEY PHILLIPS, PA-C's prescribing is 1% brand-name and 99% generic drugs by claim count, with $211 in brand drug costs.
Does RILEY PHILLIPS, PA-C prescribe opioids?
Yes, RILEY PHILLIPS, PA-C had 49 opioid claims in 2023 with an opioid prescribing rate of 6.1%.
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.
What drugs does RILEY PHILLIPS, PA-C prescribe most often?
Based on 2023 Medicare Part D data, RILEY PHILLIPS, PA-C's most frequently prescribed drugs include Methylprednisolone, Gabapentin, Meloxicam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RILEY PHILLIPS, PA-C accept Medicare?
RILEY PHILLIPS, PA-C appears in CMS Medicare data with 802 Part D claims and 404 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RILEY PHILLIPS, PA-C's credentials?
RILEY PHILLIPS, PA-C's NPI is 1073079125 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

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