2026 NPPES data Physician Assistant NPI 1558728295 PA-C
Verify on CMS →

CHELSEA KEELER, PA-C

Physician Assistant in BEL AIR, Maryland. 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
2K
Medicare Part D claims · 415 beneficiaries · Physician Assistant avg: 790
Generic prescribing
38%
generic claims · 62% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$314.74
10 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

CHELSEA KEELER, PA-C filed 1,919 Medicare Part D claims in 2023 as a Physician Assistant in BEL AIR, Maryland, prescribing 38% generic.

2K
Part D claims, 2023
38%
generic prescribing
$314.74
industry payments (Sunshine Act)

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.

CHELSEA KEELER, PA-C's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

1,919 Top 16% higher than 84% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). This entry sits in this band. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about CHELSEA KEELER, PA-C?

Quality data not reported

NPI registry status

Active

Issued 01/26/2016

NPI 1558728295

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

1,919 143% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Maryland

How Physician Assistant compares to other specialties among Maryland providers

Maryland providers

Physician Assistant share within Maryland

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

Specialty board-certification context

Estimated specialty board-certified rate — Physician Assistant (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Physician Assistant ABMS/AOA estimate

Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Physician Assistant) — ABMS / AOA estimate

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).

CHELSEA KEELER, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 227 GATEWAY DR STE J, BEL AIR, MD, 21014, with a listed phone of (410) 832-3400. NPI 1558728295 was issued on 01/26/2016. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KEELER 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 1,919 prescription claims written by this provider, covering 415 Medicare beneficiaries and totaling roughly $970K in drug spend, split 62% brand-name and 38% generic by claim count. 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.

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

227 GATEWAY DR STE J
BEL AIR, MD 21014

Provider Details

NPI 1558728295
Specialty Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 01/26/2016

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for CHELSEA KEELER, PA-C. Source: openpaymentsdata.cms.gov.

Total received

$315

Largest payer

GlaxoSmithKline, LLC.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Brand-heavy

CHELSEA KEELER, PA-C — brand share 62.0%
Specialty average (est.)

62% brand-name claims vs 38% generic, on 1,919 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.

1,919
Total Claims
$970K
Total Drug Cost
415
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,841
Total Day Supply
78,178
Brand vs Generic
62% brand / 38% generic
Brand Drug Cost
$938K
Generic Drug Cost
$31K
Antibiotic Claims
137

Patient Demographics

Average Patient Age
73.6 years
Avg HCC Risk Score
1.80
Gender Split
57% female / 43% male
Age Distribution
<65: 53, 65-74: 149, 75-84: 170, 85+: 43

Top Prescribed Drugs (Medicare Part D)

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

What CHELSEA KEELER, PA-C prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Trelegy Ellipta
Fluticasone/Umeclidin/Vilanter
285
Albuterol Sulfate Hfa
Albuterol Sulfate
261
Prednisone
159
Breo Ellipta
Fluticasone/Vilanterol
153
Azithromycin
105
Anoro Ellipta
Umeclidinium Brm/Vilanterol Tr
96
Spiriva Respimat
Tiotropium Bromide
82
Montelukast Sodium
75
Stiolto Respimat
Tiotropium Br/Olodaterol Hcl
70
Arnuity Ellipta
Fluticasone Furoate
58

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

Physician Assistant Overview

How CHELSEA KEELER, 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

CHELSEA KEELER, PA-C's 1,919 claims are above the specialty average of 790.

Nearby Physician Assistant Providers in Maryland

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

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

Frequently Asked Questions

What is CHELSEA KEELER, PA-C's specialty?
CHELSEA KEELER, PA-C specializes in Physician Assistant and practices in BEL AIR, Maryland. Credentials: PA-C.
How much does CHELSEA KEELER, PA-C prescribe under Medicare Part D?
In 2023, CHELSEA KEELER, PA-C wrote 1,919 Medicare Part D claims totaling $970K in drug costs for 415 beneficiaries.
Where is CHELSEA KEELER, PA-C located?
CHELSEA KEELER, PA-C is located at 227 GATEWAY DR STE J, BEL AIR, MD, 21014. Phone: (410) 832-3400.
What is CHELSEA KEELER, PA-C's NPI number?
CHELSEA KEELER, PA-C's National Provider Identifier (NPI) is 1558728295, issued on 01/26/2016.
Does CHELSEA KEELER, PA-C prescribe more brand-name or generic drugs?
CHELSEA KEELER, PA-C's prescribing is 62% brand-name and 38% generic drugs by claim count, with $938K in brand drug costs.
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 CHELSEA KEELER, PA-C prescribe most often?
Based on 2023 Medicare Part D data, CHELSEA KEELER, PA-C's most frequently prescribed drugs include Trelegy Ellipta, Albuterol Sulfate Hfa, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHELSEA KEELER, PA-C accept Medicare?
CHELSEA KEELER, PA-C appears in CMS Medicare data with 1,919 Part D claims and 415 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHELSEA KEELER, PA-C's credentials?
CHELSEA KEELER, PA-C's NPI is 1558728295 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.
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