2026 NPPES data Hematology & Oncology Physician NPI 1538575154 M.D.
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ALEJANDRO CARVAJAL, M.D.

Hematology & Oncology Physician in PUTNAM, Connecticut. 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
600
Medicare Part D claims · 127 beneficiaries · Hematology & Oncology Physician avg: 847
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$273.94
12 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: ALEJANDRO CARVAJAL, M.D. is a Hematology & Oncology Physician ([object Object]) practicing in PUTNAM, Connecticut with a Medicare Part D prescribing footprint of 600 claims across 127 beneficiaries — 8% brand-name prescribing . Industry payments of $273.94 across 12 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: ALEJANDRO CARVAJAL, M.D. filed 600 Medicare Part D claims in 2023 across PUTNAM, Connecticut. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ALEJANDRO CARVAJAL, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

ALEJANDRO CARVAJAL, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 07/02/2014

NPI 1538575154

Primary specialty

Hematology & Oncology Physician

Mid-sized

11,215 US NPIs in this specialty

Medicare Part D claims

600 29% vs specialty avg

2023 prescription claims

Specialty avg: 847

Specialty distribution in Connecticut

How Hematology & Oncology Physician compares to other specialties among Connecticut providers

Connecticut providers

Hematology & Oncology Physician share within Connecticut

1. Hematology & Oncology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hematology & Oncology Physician share within Connecticut

Specialty board-certification context

Estimated specialty board-certified rate — Hematology & Oncology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Hematology & Oncology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hematology & Oncology 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).

ALEJANDRO CARVAJAL, M.D. is a Hematology & Oncology Physician provider practicing in PUTNAM, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1538575154. 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.

ALEJANDRO CARVAJAL, M.D. appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding M.D. credentials at 320 POMFRET ST, PUTNAM, CT, 06260, with a listed phone of (860) 928-6541. NPI 1538575154 was issued on 07/02/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CARVAJAL 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 600 prescription claims written by this provider, covering 127 Medicare beneficiaries and totaling roughly $533K in drug spend, split 8% brand-name and 92% generic by claim count, with an opioid prescribing rate of 3.8%. 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.

Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,215 enrolled providers across 54 states and an average of 847 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

320 POMFRET ST
PUTNAM, CT 06260

Provider Details

NPI 1538575154
Specialty Hematology & Oncology Physician
Credentials M.D.
Gender Male
NPI Issued 07/02/2014

Hospital and facility affiliations

Facilities where ALEJANDRO CARVAJAL, M.D. 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.

DAY KIMBALL HEALTHCARE, INC.
PUTNAM, CT

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

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 ALEJANDRO CARVAJAL, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$274

Largest payer

Tempus AI, Inc

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 · Generic-heavy

ALEJANDRO CARVAJAL, M.D. — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 600 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.

600
Total Claims
$533K
Total Drug Cost
127
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
859
Total Day Supply
22,006
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$400K
Generic Drug Cost
$133K
Opioid Claims
23 (3.8% rate)
Antibiotic Claims
24

Patient Demographics

Average Patient Age
73.9 years
Avg HCC Risk Score
1.72
Gender Split
64% female / 36% male
Age Distribution
<65: 17, 65-74: 48, 75-84: 46, 85+: 16

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Letrozole
88
Prednisone
52
Prochlorperazine Maleate
39
Ondansetron Odt
Ondansetron
35
Lidocaine-Prilocaine
Lidocaine/Prilocaine
30
Tamoxifen Citrate
24
Abiraterone Acetate
23
Hydroxyurea
21
Anastrozole
18
Imatinib Mesylate
18

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

Hematology & Oncology Physician Overview

How ALEJANDRO CARVAJAL, M.D. fits within the Hematology & Oncology Physician landscape nationally.

11,215
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider

ALEJANDRO CARVAJAL, M.D.'s 600 claims are below the specialty average of 847.

Nearby Hematology & Oncology Physician Providers in Connecticut

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

Compare Hematology & Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALEJANDRO CARVAJAL, M.D.'s specialty?
ALEJANDRO CARVAJAL, M.D. specializes in Hematology & Oncology Physician and practices in PUTNAM, Connecticut. Credentials: M.D..
How much does ALEJANDRO CARVAJAL, M.D. prescribe under Medicare Part D?
In 2023, ALEJANDRO CARVAJAL, M.D. wrote 600 Medicare Part D claims totaling $533K in drug costs for 127 beneficiaries.
Where is ALEJANDRO CARVAJAL, M.D. located?
ALEJANDRO CARVAJAL, M.D. is located at 320 POMFRET ST, PUTNAM, CT, 06260. Phone: (860) 928-6541.
What is ALEJANDRO CARVAJAL, M.D.'s NPI number?
ALEJANDRO CARVAJAL, M.D.'s National Provider Identifier (NPI) is 1538575154, issued on 07/02/2014.
Does ALEJANDRO CARVAJAL, M.D. prescribe more brand-name or generic drugs?
ALEJANDRO CARVAJAL, M.D.'s prescribing is 8% brand-name and 92% generic drugs by claim count, with $400K in brand drug costs.
Does ALEJANDRO CARVAJAL, M.D. prescribe opioids?
Yes, ALEJANDRO CARVAJAL, M.D. had 23 opioid claims in 2023 with an opioid prescribing rate of 3.8%.
How many Hematology & Oncology Physician providers are there in the US?
There are 11,215 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does ALEJANDRO CARVAJAL, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ALEJANDRO CARVAJAL, M.D.'s most frequently prescribed drugs include Letrozole, Prednisone, Prochlorperazine Maleate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALEJANDRO CARVAJAL, M.D. accept Medicare?
ALEJANDRO CARVAJAL, M.D. appears in CMS Medicare data with 600 Part D claims and 127 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALEJANDRO CARVAJAL, M.D.'s credentials?
ALEJANDRO CARVAJAL, M.D.'s NPI is 1538575154 with credentials M.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