NPI registry status
Active
2026 NPPES data Plastic Surgery Physician NPI 1225041585 M.D.
Verify on CMS → Walter Siemian, M.D.
Plastic Surgery Physician in Ocoee, Florida.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 5,431 in Plastic Surgery Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
173
Medicare Part D claims · 50 beneficiaries · Plastic Surgery Physician avg: 88
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Walter Siemian, M.D. filed 173 Medicare Part D claims in 2024 as a Plastic Surgery Physician in Ocoee, Florida.
- 173
- Part D claims, 2024
- ≥34th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Walter Siemian, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1225041585), first enumerated 08/15/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 173 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Siemian with other Plastic Surgery Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Florida
- Dr. Andrew Abadeer, MD Tampa, FL
- Dr. Sheikh Abdullah, M.D. St Petersburg, FL
- Dr. Stefan Adair, M.D. Sarasota, FL
- Dr. Christopher Adamson, M.D. Sarasota, FL
- Dr. Paul Afrooz, MD Coral Gables, FL
- Dr. Joseph Aguiar, MD Tampa, FL
Other specialties in Ocoee: Behavior Technician (185) · Pharmacist (61) · Physical Therapist (58) · Family Nurse Practitioner (54)
CMS NPPES provider registry desk
NPI 1225041585 · Plastic Surgery Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1225041585
- ENUM-LEGACY 2006
- TAX-MID 5K Plastic Surgery
- RX-LIGHT 173
- BOOK-THIN 487 in Florida
- PHOTO-ENUM Michael Clinton, MD · 2006
Walter Siemian, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
173 ≥ 34th percentile 34% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
Walter Siemian, M.D. 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 Walter Siemian, M.D.?
Quality data not reportedPrimary specialty
Plastic Surgery Physician
Medicare Part D claims
173 97% vs specialty avg
Specialty distribution in Florida
How Plastic Surgery Physician compares to other specialties among Florida providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Plastic Surgery Physician. Verify directly:
How MIPS and board certification work
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).
Practice Address
Provider Details
| NPI | 1225041585 |
|---|---|
| Specialty | Plastic Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/15/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
173
Total Claims
$536
Total Drug Cost
50
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 173
- Total Day Supply
- 583
- Brand Drug Cost
- $0
- Generic Drug Cost
- $536
- Opioid Claims
- 45 (26.0% rate)
- Antibiotic Claims
- 66
Patient Demographics
- Average Patient Age
- 67.2 years
- Avg HCC Risk Score
- 0.81
- Age Distribution
- <65: 11, 65-74: 33, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Walter Siemian, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Cephalexin
Cephalexin
55 claims
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
38 claims
- Ondansetron Odt
Ondansetron Odt
29 claims
- Clonidine Hcl 14
Clonidine Hcl
14 claims
| Drug | Claims |
|---|---|
| Cephalexin | 55 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 38 |
| Ondansetron Odt Ondansetron | 29 |
| Clonidine Hcl | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Plastic Surgery Physician Overview
How Walter Siemian, M.D. fits within the Plastic Surgery Physician landscape nationally.
5,431
Plastic Surgery Physician Providers in US
53
States with Plastic Surgery Physician
88
Avg Claims per Provider
Walter Siemian, M.D.'s 173 claims are above the specialty average of 88.
Nationwide Plastic Surgery Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Siemian, both outside Florida so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Plastic Surgery Physician Providers in Florida
Other clinicians with the same primary specialty enrolled in Florida, drawn from the same CMS NPPES roster as Siemian.
One of 487 Plastic Surgery Physician providers enrolled in Florida, 11 are shown on this page.
Dr. Khaled Alameddine
MD
Coral Gables, FL
Dr. Paul Albear
MD
Wesley Chapel, FL
Dr. David Alperstein
M.D.
Plantation, FL
Dr. Jason Altman
M.D.
Coral Gables, FL
Dr. Sergio Alvarez
M.D.
Miami Beach, FL
Compare Plastic Surgery Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Walter Siemian, M.D.'s specialty? ▼
Walter Siemian, M.D. specializes in Plastic Surgery Physician and practices in Ocoee, Florida. Credentials: M.D..
How much does Walter Siemian, M.D. prescribe under Medicare Part D? ▼
In 2024, Walter Siemian, M.D. wrote 173 Medicare Part D claims totaling $536 in drug costs for 50 beneficiaries.
Where is Walter Siemian, M.D. located? ▼
Walter Siemian, M.D. is located at 10,000 W COLONIAL DR, Ocoee, FL, 34761. Phone: (407) 521-7431.
What is Walter Siemian, M.D.'s NPI number? ▼
Walter Siemian, M.D.'s National Provider Identifier (NPI) is 1225041585, issued on 08/15/2006.
Does Walter Siemian, M.D. prescribe opioids? ▼
Yes, Walter Siemian, M.D. had 45 opioid claims in 2024 with an opioid prescribing rate of 26.0%.
How many Plastic Surgery Physician providers are there in the US? ▼
There are 5,431 Plastic Surgery Physician providers across 53 states in the US. The average Plastic Surgery Physician provider writes 88 Medicare Part D claims per year.
What drugs does Walter Siemian, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Walter Siemian, M.D.'s most frequently prescribed drugs include Cephalexin, Oxycodone-Acetaminophen, Ondansetron Odt. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Walter Siemian, M.D. accept Medicare? ▼
Walter Siemian, M.D. appears in CMS Medicare data with 173 Part D claims and 50 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Walter Siemian, M.D.'s credentials? ▼
Walter Siemian, M.D.'s NPI is 1225041585 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
View source datasets and methodology notes
- 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 (2024). 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 2026.