2026 NPPES data Ambulatory Care Pharmacist NPI 1548353865 PHARM.D.
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JOY LEOTSAKOS, PHARM.D.

Ambulatory Care Pharmacist in MEDFORD, Massachusetts. 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
355
Medicare Part D claims · 49 beneficiaries · Ambulatory Care Pharmacist avg: 492
Generic prescribing
28%
generic claims · 72% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JOY LEOTSAKOS, PHARM.D. filed 355 Medicare Part D claims in 2023 as a Ambulatory Care Pharmacist in MEDFORD, Massachusetts, prescribing 28% generic.

355
Part D claims, 2023
28%
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.

JOY LEOTSAKOS, PHARM.D.'s Medicare Part D volume vs every U.S. prescriber

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

355 Top 43% higher than 57% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 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 JOY LEOTSAKOS, PHARM.D.?

Quality data not reported

NPI registry status

Active

Issued 09/30/2006

NPI 1548353865

Primary specialty

Ambulatory Care Pharmacist

Niche

3,473 US NPIs in this specialty

Medicare Part D claims

355 28% vs specialty avg

2023 prescription claims

Specialty avg: 492

Specialty distribution in Massachusetts

How Ambulatory Care Pharmacist compares to other specialties among Massachusetts providers

Massachusetts providers

Ambulatory Care Pharmacist share within Massachusetts

1. Ambulatory Care Pharmacist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ambulatory Care Pharmacist share within Massachusetts

Specialty board-certification context

Estimated specialty board-certified rate — Ambulatory Care Pharmacist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Ambulatory Care Pharmacist ABMS/AOA estimate

Est. board-certified rate (Ambulatory Care Pharmacist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Ambulatory Care Pharmacist) — 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).

JOY LEOTSAKOS, PHARM.D. is a Ambulatory Care Pharmacist provider practicing in MEDFORD, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PHARM.D.. NPI: 1548353865. 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.

JOY LEOTSAKOS, PHARM.D. appears in the CMS NPPES registry as a Ambulatory Care Pharmacist provider holding PHARM.D. credentials at 26 CITY HALL MALL, MEDFORD, MA, 02155, with a listed phone of (781) 306-5130. NPI 1548353865 was issued on 09/30/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LEOTSAKOS 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 355 prescription claims written by this provider, covering 49 Medicare beneficiaries and totaling roughly $238K in drug spend, split 72% brand-name and 28% 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.

Ambulatory Care Pharmacist is a narrow specialty nationwide, with 3,473 enrolled providers across 52 states and an average of 492 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

26 CITY HALL MALL
MEDFORD, MA 02155

Provider Details

NPI 1548353865
Specialty Ambulatory Care Pharmacist
Credentials PHARM.D.
Gender Female
NPI Issued 09/30/2006

License & disciplinary context — Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 — they are NOT specific to JOY LEOTSAKOS, PHARM.D.. To verify JOY LEOTSAKOS, PHARM.D.'s current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Brand-heavy

JOY LEOTSAKOS, PHARM.D. — brand share 72.0%
Specialty average (est.)

72% brand-name claims vs 28% generic, on 355 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.

355
Total Claims
$238K
Total Drug Cost
49
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
635
Total Day Supply
18,701
Brand vs Generic
72% brand / 28% generic
Brand Drug Cost
$234K
Generic Drug Cost
$1K

Patient Demographics

Average Patient Age
71.2 years
Avg HCC Risk Score
1.42
Gender Split
41% female / 59% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Ozempic
Semaglutide
88
Tresiba Flextouch U-200
Insulin Degludec
31
Mounjaro
Tirzepatide
20
Humalog Kwikpen U-100
Insulin Lispro
13
Metformin Hcl Er
Metformin Hcl
12
Trulicity
Dulaglutide
12
Basaglar Kwikpen U-100
"Insulin Glargine
N/A
Lantus Solostar
"Insulin Glargine
N/A
Nano 2nd Gen Pen Needle
"Pen Needle
N/A
Ultra-Fine Nano Pen Needle
"Pen Needle
N/A

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

Ambulatory Care Pharmacist Overview

How JOY LEOTSAKOS, PHARM.D. fits within the Ambulatory Care Pharmacist landscape nationally.

3,473
Ambulatory Care Pharmacist Providers in US
52
States with Ambulatory Care Pharmacist
492
Avg Claims per Provider

JOY LEOTSAKOS, PHARM.D.'s 355 claims are below the specialty average of 492.

Nearby Ambulatory Care Pharmacist Providers in Massachusetts

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

Compare Ambulatory Care Pharmacist nationally: see state-by-state distribution →

Frequently Asked Questions

What is JOY LEOTSAKOS, PHARM.D.'s specialty?
JOY LEOTSAKOS, PHARM.D. specializes in Ambulatory Care Pharmacist and practices in MEDFORD, Massachusetts. Credentials: PHARM.D..
How much does JOY LEOTSAKOS, PHARM.D. prescribe under Medicare Part D?
In 2023, JOY LEOTSAKOS, PHARM.D. wrote 355 Medicare Part D claims totaling $238K in drug costs for 49 beneficiaries.
Where is JOY LEOTSAKOS, PHARM.D. located?
JOY LEOTSAKOS, PHARM.D. is located at 26 CITY HALL MALL, MEDFORD, MA, 02155. Phone: (781) 306-5130.
What is JOY LEOTSAKOS, PHARM.D.'s NPI number?
JOY LEOTSAKOS, PHARM.D.'s National Provider Identifier (NPI) is 1548353865, issued on 09/30/2006.
Does JOY LEOTSAKOS, PHARM.D. prescribe more brand-name or generic drugs?
JOY LEOTSAKOS, PHARM.D.'s prescribing is 72% brand-name and 28% generic drugs by claim count, with $234K in brand drug costs.
How many Ambulatory Care Pharmacist providers are there in the US?
There are 3,473 Ambulatory Care Pharmacist providers across 52 states in the US. The average Ambulatory Care Pharmacist provider writes 492 Medicare Part D claims per year.
What drugs does JOY LEOTSAKOS, PHARM.D. prescribe most often?
Based on 2023 Medicare Part D data, JOY LEOTSAKOS, PHARM.D.'s most frequently prescribed drugs include Ozempic, Tresiba Flextouch U-200, Mounjaro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOY LEOTSAKOS, PHARM.D. accept Medicare?
JOY LEOTSAKOS, PHARM.D. appears in CMS Medicare data with 355 Part D claims and 49 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOY LEOTSAKOS, PHARM.D.'s credentials?
JOY LEOTSAKOS, PHARM.D.'s NPI is 1548353865 with credentials PHARM.D.. 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