2026 NPPES data Family Medicine Physician NPI 1164713400 D.O.
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JAMES JOSLIN, D.O.

Family Medicine Physician in LAS VEGAS, Nevada. 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
8K
Medicare Part D claims · 849 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JAMES JOSLIN, D.O. filed 7,882 Medicare Part D claims in 2023 as a Family Medicine Physician in LAS VEGAS, Nevada, prescribing 90% generic.

8K
Part D claims, 2023
90%
generic prescribing

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.

JAMES JOSLIN, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

7,882 Top 3% higher than 97% 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%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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

Board-eligible specialty (heuristic — not verified)

JAMES JOSLIN, D.O. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about JAMES JOSLIN, D.O.?

Quality data not reported

NPI registry status

Active

Issued 04/20/2011

NPI 1164713400

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

7,882 131% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Nevada

How Family Medicine Physician compares to other specialties among Nevada providers

Nevada providers

Family Medicine Physician share within Nevada

1. Family Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Family Medicine Physician share within Nevada

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Family Medicine Physician) — 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).

JAMES JOSLIN, D.O. appears in the CMS NPPES registry as a Family Medicine Physician provider holding D.O. credentials at 1655 E CACTUS AVE, LAS VEGAS, NV, 89183, with a listed phone of (702) 724-8880. NPI 1164713400 was issued on 04/20/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JOSLIN 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 7,882 prescription claims written by this provider, covering 849 Medicare beneficiaries and totaling roughly $554K in drug spend, split 10% brand-name and 90% generic by claim count, with an opioid prescribing rate of 2.7%. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

1655 E CACTUS AVE
LAS VEGAS, NV 89183

Provider Details

NPI 1164713400
Specialty Family Medicine Physician
Credentials D.O.
Gender Male
NPI Issued 04/20/2011

Brand vs generic prescribing mix · Typical

JAMES JOSLIN, D.O. — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 7,882 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.

7,882
Total Claims
$554K
Total Drug Cost
849
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
20,899
Total Day Supply
621,707
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$417K
Generic Drug Cost
$135K
Opioid Claims
210 (2.7% rate)
Antibiotic Claims
22

Patient Demographics

Average Patient Age
74.6 years
Avg HCC Risk Score
1.66
Gender Split
48% female / 52% male
Age Distribution
<65: 53, 65-74: 371, 75-84: 311, 85+: 114

Top Prescribed Drugs (Medicare Part D)

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

What JAMES JOSLIN, D.O. 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
Atorvastatin Calcium
733
Lisinopril
398
Amlodipine Besylate
396
Metformin Hcl
287
Omeprazole
257
Levothyroxine Sodium
255
Losartan Potassium
248
Rosuvastatin Calcium
223
Gabapentin
201
Hydrochlorothiazide
192

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

Family Medicine Physician Overview

How JAMES JOSLIN, D.O. fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

JAMES JOSLIN, D.O.'s 7,882 claims are above the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Nevada

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JAMES JOSLIN, D.O.'s specialty?
JAMES JOSLIN, D.O. specializes in Family Medicine Physician and practices in LAS VEGAS, Nevada. Credentials: D.O..
How much does JAMES JOSLIN, D.O. prescribe under Medicare Part D?
In 2023, JAMES JOSLIN, D.O. wrote 7,882 Medicare Part D claims totaling $554K in drug costs for 849 beneficiaries.
Where is JAMES JOSLIN, D.O. located?
JAMES JOSLIN, D.O. is located at 1655 E CACTUS AVE, LAS VEGAS, NV, 89183. Phone: (702) 724-8880.
What is JAMES JOSLIN, D.O.'s NPI number?
JAMES JOSLIN, D.O.'s National Provider Identifier (NPI) is 1164713400, issued on 04/20/2011.
Does JAMES JOSLIN, D.O. prescribe more brand-name or generic drugs?
JAMES JOSLIN, D.O.'s prescribing is 10% brand-name and 90% generic drugs by claim count, with $417K in brand drug costs.
Does JAMES JOSLIN, D.O. prescribe opioids?
Yes, JAMES JOSLIN, D.O. had 210 opioid claims in 2023 with an opioid prescribing rate of 2.7%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does JAMES JOSLIN, D.O. prescribe most often?
Based on 2023 Medicare Part D data, JAMES JOSLIN, D.O.'s most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JAMES JOSLIN, D.O. accept Medicare?
JAMES JOSLIN, D.O. appears in CMS Medicare data with 7,882 Part D claims and 849 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JAMES JOSLIN, D.O.'s credentials?
JAMES JOSLIN, D.O.'s NPI is 1164713400 with credentials D.O.. 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