NPI registry status
Active
2026 NPPES data Urology Physician NPI 1598836405 MD
Verify on CMS → Amir Houshiar, MD
Urology Physician in Anaheim, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 13,367 in Urology 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
1K
Medicare Part D claims · 448 beneficiaries · Urology Physician avg: 1K
Generic prescribing
91%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Amir Houshiar, MD filed 1,383 Medicare Part D claims in 2023 as a Urology Physician in Anaheim, California, prescribing 91% generic.
- 1K
- Part D claims, 2023
- 91%
- 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.
Amir Houshiar, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,383 Top 21% higher than 79% of 1,370,886 prescribers
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)
Amir Houshiar, MD 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 Amir Houshiar, MD?
Quality data not reportedPrimary specialty
Urology Physician
Medicare Part D claims
1,383 8% vs specialty avg
Specialty distribution in California
How Urology Physician compares to other specialties among California 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 Urology 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).
Amir Houshiar, MD appears in the CMS NPPES registry as a Urology Physician provider holding MD credentials at 441 N LAKEVIEW AVE, Anaheim, CA, 92807, with a listed phone of (888) 988-2800. NPI 1598836405 was issued on 11/13/2006.
Medicare Part D records for calendar year 2023 show 1,383 prescription claims written by this provider, covering 448 Medicare beneficiaries and totaling roughly $88K in drug spend, split 6% brand-name and 91% generic by claim count, with an opioid prescribing rate of 7.6%.
Urology Physician is a mid-sized specialty nationwide, with 13,367 enrolled providers across 54 states and an average of 1,280 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
Provider Details
| NPI | 1598836405 |
|---|---|
| Specialty | Urology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/13/2006 |
Hospital and facility affiliations
Facilities where Amir Houshiar, MD 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.
Southern California Permanente Medical Group
Anaheim, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Amir Houshiar, MD. To verify Amir Houshiar, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Amir Houshiar, MD - brand share 6.0%
Urology Physician average
6% brand-name claims vs 91% generic, on 1,383 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.
1,383
Total Claims
$88K
Total Drug Cost
448
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,454
- Total Day Supply
- 96,020
- Brand vs Generic
- 6% brand / 91% generic
- Brand Drug Cost
- $60K
- Generic Drug Cost
- $29K
- Opioid Claims
- 105 (7.6% rate)
- Antibiotic Claims
- 197
Patient Demographics
- Average Patient Age
- 76.3 years
- Avg HCC Risk Score
- 1.49
- Gender Split
- 11% female / 89% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Amir Houshiar, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Finasteride
Finasteride
362 claims
- Tamsulosin Hcl
Tamsulosin Hcl
280 claims
- Trospium Chloride 127
Trospium Chloride
127 claims
- Ciprofloxacin Hcl 93
Ciprofloxacin Hcl
93 claims
- Hydrocodone-Acetam… 89
Hydrocodone-Acetaminophen
89 claims
- Terazosin Hcl 89
Terazosin Hcl
89 claims
- Myrbetriq 70
Myrbetriq
70 claims
- Cephalexin 37
Cephalexin
37 claims
| Drug | Claims |
|---|---|
| Finasteride | 362 |
| Tamsulosin Hcl | 280 |
| Trospium Chloride | 127 |
| Ciprofloxacin Hcl | 93 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 89 |
| Terazosin Hcl | 89 |
| Myrbetriq Mirabegron | 70 |
| Cephalexin | 37 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 30 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 28 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Urology Physician Overview
How Amir Houshiar, MD fits within the Urology Physician landscape nationally.
13,367
Urology Physician Providers in US
54
States with Urology Physician
1,280
Avg Claims per Provider
Amir Houshiar, MD's 1,383 claims are above the specialty average of 1,280.
Nearby Urology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Houshiar.
Dr. David Aaronson
MD
Oakland, CA
Dr. Jason Abber
MD
Panorama City, CA
Dr. Marc Abboud
MD
Los Alamitos, CA
George Abdelsayed
Anaheim, CA
Garen Abedi
Downey, CA
Compare Urology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Urology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore California
Frequently Asked Questions
What is Amir Houshiar, MD's specialty? ▼
Amir Houshiar, MD specializes in Urology Physician and practices in Anaheim, California. Credentials: MD.
How much does Amir Houshiar, MD prescribe under Medicare Part D? ▼
In 2023, Amir Houshiar, MD wrote 1,383 Medicare Part D claims totaling $88K in drug costs for 448 beneficiaries.
Where is Amir Houshiar, MD located? ▼
Amir Houshiar, MD is located at 441 N LAKEVIEW AVE, Anaheim, CA, 92807. Phone: (888) 988-2800.
What is Amir Houshiar, MD's NPI number? ▼
Amir Houshiar, MD's National Provider Identifier (NPI) is 1598836405, issued on 11/13/2006.
Does Amir Houshiar, MD prescribe more brand-name or generic drugs? ▼
Amir Houshiar, MD's prescribing is 6% brand-name and 91% generic drugs by claim count, with $60K in brand drug costs.
Does Amir Houshiar, MD prescribe opioids? ▼
Yes, Amir Houshiar, MD had 105 opioid claims in 2023 with an opioid prescribing rate of 7.6%.
How many Urology Physician providers are there in the US? ▼
There are 13,367 Urology Physician providers across 54 states in the US. The average Urology Physician provider writes 1,280 Medicare Part D claims per year.
What drugs does Amir Houshiar, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Amir Houshiar, MD's most frequently prescribed drugs include Finasteride, Tamsulosin Hcl, Trospium Chloride. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Amir Houshiar, MD accept Medicare? ▼
Amir Houshiar, MD appears in CMS Medicare data with 1,383 Part D claims and 448 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Amir Houshiar, MD's credentials? ▼
Amir Houshiar, MD's NPI is 1598836405 with credentials MD. 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 (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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.