NPI registry status
Active
2026 NPPES data Surgery Physician NPI 1619973120 M.D.,P.A.
Verify on CMS → Gregory Andreassian, M.D.,P.A.
Surgery Physician in Fredericksburg, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 36,191 in 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
169
Medicare Part D claims · 104 beneficiaries · Surgery Physician avg: 169
Generic prescribing
74%
generic claims · 26% 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
Gregory Andreassian, M.D.,P.A. filed 169 Medicare Part D claims in 2023 as a Surgery Physician in Fredericksburg, Texas, prescribing 74% generic.
- 169
- Part D claims, 2023
- 74%
- 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.
Gregory Andreassian, M.D.,P.A.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
169 35th percentile higher than 35% 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-eligible specialty (heuristic, not verified)
Gregory Andreassian, M.D.,P.A. 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 Gregory Andreassian, M.D.,P.A.?
Quality data not reportedPrimary specialty
Surgery Physician
Medicare Part D claims
169 0% vs specialty avg
Specialty distribution in Texas
How Surgery Physician compares to other specialties among Texas 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 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).
Gregory Andreassian, M.D.,P.A. appears in the CMS NPPES registry as a Surgery Physician provider holding M.D.,P.A. credentials at 205 W WINDCREST ST STE 130, Fredericksburg, TX, 78624, with a listed phone of (830) 997-6773. NPI 1619973120 was issued on 06/21/2005.
Medicare Part D records for calendar year 2023 show 169 prescription claims written by this provider, covering 104 Medicare beneficiaries and totaling roughly $9K in drug spend, split 26% brand-name and 74% generic by claim count, with an opioid prescribing rate of 32.0%.
Surgery Physician is a mid-sized specialty nationwide, with 36,191 enrolled providers across 56 states and an average of 169 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 | 1619973120 |
|---|---|
| Specialty | Surgery Physician |
| Credentials | M.D.,P.A. |
| Gender | Male |
| NPI Issued | 06/21/2005 |
License & disciplinary context - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Gregory Andreassian, M.D.,P.A.. To verify Gregory Andreassian, M.D.,P.A.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Gregory Andreassian, M.D.,P.A. - brand share 26.0%
Surgery Physician average
26% brand-name claims vs 74% generic, on 169 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.
169
Total Claims
$9K
Total Drug Cost
104
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 185
- Total Day Supply
- 1,626
- Brand vs Generic
- 26% brand / 74% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $2K
- Opioid Claims
- 54 (32.0% rate)
- Antibiotic Claims
- 28
Patient Demographics
- Average Patient Age
- 74.0 years
- Avg HCC Risk Score
- 0.94
- Gender Split
- 57% female / 43% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gregory Andreassian, M.D.,P.A. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Sutab
Sutab
42 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
36 claims
- Metoclopramide Hcl 12
Metoclopramide Hcl
12 claims
- Tramadol Hcl 11
Tramadol Hcl
11 claims
| Drug | Claims |
|---|---|
| Sutab Sod Sulf/Pot Chloride/Mag Sulf | 42 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 36 |
| Metoclopramide Hcl | 12 |
| Tramadol Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Surgery Physician Overview
How Gregory Andreassian, M.D.,P.A. fits within the Surgery Physician landscape nationally.
36,191
Surgery Physician Providers in US
56
States with Surgery Physician
169
Avg Claims per Provider
Gregory Andreassian, M.D.,P.A.'s 169 claims are below the specialty average of 169.
Nearby Surgery Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Andreassian.
Dr. Alan Abando
M.D.
Cedar Park, TX
Dr. Aaron Abarbanell
MD
San Antonio, TX
Dr. Paulette Abbas
M.D.
Dallas, TX
Dr. Babak Abbassi
M.D.
Greenville, TX
Dr. Steven Abbate
MD
San Antonio, TX
Compare Surgery 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 Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Surgery 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.
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Frequently Asked Questions
What is Gregory Andreassian, M.D.,P.A.'s specialty? ▼
Gregory Andreassian, M.D.,P.A. specializes in Surgery Physician and practices in Fredericksburg, Texas. Credentials: M.D.,P.A..
How much does Gregory Andreassian, M.D.,P.A. prescribe under Medicare Part D? ▼
In 2023, Gregory Andreassian, M.D.,P.A. wrote 169 Medicare Part D claims totaling $9K in drug costs for 104 beneficiaries.
Where is Gregory Andreassian, M.D.,P.A. located? ▼
Gregory Andreassian, M.D.,P.A. is located at 205 W WINDCREST ST STE 130, Fredericksburg, TX, 78624. Phone: (830) 997-6773.
What is Gregory Andreassian, M.D.,P.A.'s NPI number? ▼
Gregory Andreassian, M.D.,P.A.'s National Provider Identifier (NPI) is 1619973120, issued on 06/21/2005.
Does Gregory Andreassian, M.D.,P.A. prescribe more brand-name or generic drugs? ▼
Gregory Andreassian, M.D.,P.A.'s prescribing is 26% brand-name and 74% generic drugs by claim count, with $7K in brand drug costs.
Does Gregory Andreassian, M.D.,P.A. prescribe opioids? ▼
Yes, Gregory Andreassian, M.D.,P.A. had 54 opioid claims in 2023 with an opioid prescribing rate of 32.0%.
How many Surgery Physician providers are there in the US? ▼
There are 36,191 Surgery Physician providers across 56 states in the US. The average Surgery Physician provider writes 169 Medicare Part D claims per year.
What drugs does Gregory Andreassian, M.D.,P.A. prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Andreassian, M.D.,P.A.'s most frequently prescribed drugs include Sutab, Hydrocodone-Acetaminophen, Metoclopramide Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Andreassian, M.D.,P.A. accept Medicare? ▼
Gregory Andreassian, M.D.,P.A. appears in CMS Medicare data with 169 Part D claims and 104 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Andreassian, M.D.,P.A.'s credentials? ▼
Gregory Andreassian, M.D.,P.A.'s NPI is 1619973120 with credentials M.D.,P.A.. 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.