2026 NPPES data Hospice and Palliative Medicine (Internal Medicine) Physician NPI 1912177288 M.D.
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IVAN ZAMA, M.D.

Hospice and Palliative Medicine (Internal Medicine) Physician in GREENBELT, 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
206
Medicare Part D claims · 27 beneficiaries · Hospice and Palliative Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$476.39
8 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

IVAN ZAMA, M.D. filed 206 Medicare Part D claims in 2023 as a Hospice and Palliative Medicine (Internal Medicine) Physician in GREENBELT, Maryland, prescribing 89% generic.

206
Part D claims, 2023
89%
generic prescribing
Likely
board-certified (heuristic)

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.

IVAN ZAMA, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

206 49th percentile higher than 49% 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

Board certification likely (heuristic — not verified)

IVAN ZAMA, 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).

What does the federal data show about IVAN ZAMA, M.D.?

Quality data not reported

NPI registry status

Active

Issued 03/03/2008

NPI 1912177288

Primary specialty

Hospice and Palliative Medicine (Internal Medicine) Physician

Niche

1,524 US NPIs in this specialty

Medicare Part D claims

206 84% vs specialty avg

2023 prescription claims

Specialty avg: 1,275

Specialty distribution in Maryland

How Hospice and Palliative Medicine (Internal Medicine) Physician compares to other specialties among Maryland providers

Maryland providers

Hospice and Palliative Medicine (Internal Medicine) Physician share within Maryland

1. Hospice and Palliative Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hospice and Palliative Medicine (Internal Medicine) Physician share within Maryland

Specialty board-certification context

Estimated specialty board-certified rate — Hospice and Palliative Medicine (Internal Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Hospice and Palliative Medicine (Internal Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Hospice and Palliative Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hospice and Palliative Medicine (Internal 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).

IVAN ZAMA, M.D. appears in the CMS NPPES registry as a Hospice and Palliative Medicine (Internal Medicine) Physician provider holding M.D. credentials at 7831 BELLE POINT DR, GREENBELT, MD, 20770, with a listed phone of (301) 902-0664. NPI 1912177288 was issued on 03/03/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ZAMA 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 206 prescription claims written by this provider, covering 27 Medicare beneficiaries and totaling roughly $59K in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 73.8%. 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.

Hospice and Palliative Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 1,524 enrolled providers across 51 states and an average of 1,275 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

7831 BELLE POINT DR
GREENBELT, MD 20770

Provider Details

NPI 1912177288
Specialty Hospice and Palliative Medicine (Internal Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 03/03/2008

Hospital and facility affiliations

Facilities where IVAN ZAMA, 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.

DIMENSIONS HEALTHCARE ASSOCIATES, INC
UPPER MARLBORO, MD

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 IVAN ZAMA, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$476

Largest payer

Medtronic, 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 · Typical

IVAN ZAMA, M.D. — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 206 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.

206
Total Claims
$59K
Total Drug Cost
27
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
212
Total Day Supply
5,692
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$53K
Generic Drug Cost
$6K
Opioid Claims
152 (73.8% rate)

Patient Demographics

Average Patient Age
54.4 years
Avg HCC Risk Score
3.26
Gender Split
48% female / 52% male
Age Distribution
<65: 16, 65-74: N/A, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What IVAN ZAMA, M.D. 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
Hydromorphone Hcl
47
Morphine Sulfate Er
Morphine Sulfate
37
Oxycodone Hcl
34
Methadone Hcl
21
Hydroxyurea
18
Naloxone Hcl
11

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

Hospice and Palliative Medicine (Internal Medicine) Physician Overview

How IVAN ZAMA, M.D. fits within the Hospice and Palliative Medicine (Internal Medicine) Physician landscape nationally.

1,524
Hospice and Palliative Medicine (Internal Medicine) Physician Providers in US
51
States with Hospice and Palliative Medicine (Internal Medicine) Physician
1,275
Avg Claims per Provider

IVAN ZAMA, M.D.'s 206 claims are below the specialty average of 1,275.

Nearby Hospice and Palliative Medicine (Internal Medicine) Physician Providers in Maryland

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

Compare Hospice and Palliative Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is IVAN ZAMA, M.D.'s specialty?
IVAN ZAMA, M.D. specializes in Hospice and Palliative Medicine (Internal Medicine) Physician and practices in GREENBELT, Maryland. Credentials: M.D..
How much does IVAN ZAMA, M.D. prescribe under Medicare Part D?
In 2023, IVAN ZAMA, M.D. wrote 206 Medicare Part D claims totaling $59K in drug costs for 27 beneficiaries.
Where is IVAN ZAMA, M.D. located?
IVAN ZAMA, M.D. is located at 7831 BELLE POINT DR, GREENBELT, MD, 20770. Phone: (301) 902-0664.
What is IVAN ZAMA, M.D.'s NPI number?
IVAN ZAMA, M.D.'s National Provider Identifier (NPI) is 1912177288, issued on 03/03/2008.
Does IVAN ZAMA, M.D. prescribe more brand-name or generic drugs?
IVAN ZAMA, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $53K in brand drug costs.
Does IVAN ZAMA, M.D. prescribe opioids?
Yes, IVAN ZAMA, M.D. had 152 opioid claims in 2023 with an opioid prescribing rate of 73.8%.
How many Hospice and Palliative Medicine (Internal Medicine) Physician providers are there in the US?
There are 1,524 Hospice and Palliative Medicine (Internal Medicine) Physician providers across 51 states in the US. The average Hospice and Palliative Medicine (Internal Medicine) Physician provider writes 1,275 Medicare Part D claims per year.
What drugs does IVAN ZAMA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, IVAN ZAMA, M.D.'s most frequently prescribed drugs include Hydromorphone Hcl, Morphine Sulfate Er, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does IVAN ZAMA, M.D. accept Medicare?
IVAN ZAMA, M.D. appears in CMS Medicare data with 206 Part D claims and 27 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify IVAN ZAMA, M.D.'s credentials?
IVAN ZAMA, M.D.'s NPI is 1912177288 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