NPI registry status
Active
2026 NPPES data Chiropractor NPI 1326127820 D.C., PA-C
Verify on CMS → Hamid Hassanzadeh, D.C., PA-C
Chiropractor in Red Bluff, 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 95,504 in Chiropractor, 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
4K
Medicare Part D claims · 514 beneficiaries · Chiropractor avg: 824
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
78.3/100
▼ 5 pts below national avg 83.1 · Above neutral
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
Hamid Hassanzadeh, D.C., PA-C reported a CMS MIPS final score of 78.3/100 - below the 83.1 national average - and filed 3,622 Medicare Part D claims in 2023.
- 78.3/100
- MIPS score · -5 vs avg
- 4K
- Part D claims, 2023
- 88%
- 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.
Hamid Hassanzadeh, D.C., PA-C's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
78 27th percentile higher than 27% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Hamid Hassanzadeh, D.C., PA-C sits
This provider among chiropractor peers
Across the 60 chiropractor providers who report both Medicare Part D prescribing and a MIPS quality score, Hamid Hassanzadeh, D.C., PA-C writes more Part D claims than 90% of them and scores higher on MIPS quality than 32% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one chiropractor peer from a representative sample of 59; the gold marker is Hamid Hassanzadeh, D.C., PA-C. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Hamid Hassanzadeh, D.C., PA-C?
Near national averagePrimary specialty
Chiropractor
Medicare Part D claims
3,622 340% vs specialty avg
MIPS final score
78.3/100 4.8 pts vs avg
Specialty distribution in California
How Chiropractor compares to other specialties among California providers
Medicare quality performance, MIPS
Hamid Hassanzadeh, D.C., PA-C's 2023 MIPS final score plotted against the Chiropractor national average
- MIPS Final Score
- 78.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Chiropractor) - 78.3/100 vs national avg 83.1
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).
Hamid Hassanzadeh, D.C., PA-C appears in the CMS NPPES registry as a Chiropractor provider holding D.C., PA-C credentials at 2450 SISTER MARY COLUMBA DR, Red Bluff, CA, 96080, with a listed phone of (530) 527-0414. NPI 1326127820 was issued on 11/03/2006.
Medicare Part D records for calendar year 2023 show 3,622 prescription claims written by this provider, covering 514 Medicare beneficiaries and totaling roughly $271K in drug spend, split 12% brand-name and 88% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 78.3/100 for the 2023 performance year (Quality 71.3, Cost 45.5), compared with the national average of 83.1.
Chiropractor is a high-volume specialty nationwide, with 95,504 enrolled providers across 56 states and an average of 824 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 | 1326127820 |
|---|---|
| Specialty | Chiropractor |
| Credentials | D.C., PA-C |
| Gender | Male |
| NPI Issued | 11/03/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
78.2877
Final Score
Avg: 83.1
71.3135
Quality
45.479
Cost
93
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Hamid Hassanzadeh, D.C., PA-C 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.
Hospital Medicine Services OF NH, LLC
Rochester, NH
Speare Health Ventures Inc
Plymouth, NH
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 Hamid Hassanzadeh, D.C., PA-C. To verify Hamid Hassanzadeh, D.C., PA-C'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 · Typical
Hamid Hassanzadeh, D.C., PA-C - brand share 12.0%
Chiropractor average
12% brand-name claims vs 88% generic, on 3,622 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.
3,622
Total Claims
$271K
Total Drug Cost
514
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,657
- Total Day Supply
- 132,744
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $214K
- Generic Drug Cost
- $56K
- Antibiotic Claims
- 92
Patient Demographics
- Average Patient Age
- 69.0 years
- Avg HCC Risk Score
- 1.24
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 119, 65-74: 248, 75-84: 104, 85+: 43
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Hamid Hassanzadeh, D.C., PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
223 claims
- Lisinopril
Lisinopril
204 claims
- Levothyroxine Sodium
Levothyroxine Sodium
192 claims
- Amlodipine Besylate
Amlodipine Besylate
185 claims
- Losartan Potassium
Losartan Potassium
126 claims
- Metformin Hcl
Metformin Hcl
102 claims
- Omeprazole
Omeprazole
102 claims
- Gabapentin
Gabapentin
92 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 223 |
| Lisinopril | 204 |
| Levothyroxine Sodium | 192 |
| Amlodipine Besylate | 185 |
| Losartan Potassium | 126 |
| Metformin Hcl | 102 |
| Omeprazole | 102 |
| Gabapentin | 92 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 91 |
| Trazodone Hcl | 73 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Chiropractor Overview
How Hamid Hassanzadeh, D.C., PA-C fits within the Chiropractor landscape nationally.
95,504
Chiropractor Providers in US
56
States with Chiropractor
824
Avg Claims per Provider
Hamid Hassanzadeh, D.C., PA-C's 3,622 claims are above the specialty average of 824.
Nearby Chiropractor Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Hassanzadeh.
Dr. Karl Aamot
D.C.
Sunnyvale, CA
Dr. Beth Aarhus
D.C.
San Jose, CA
Dr. Michael Aaron
D.C.
Belmont, CA
Thao Aaron
Corona, CA
Dr. Sedie Abadi
D.C.
Los Angeles, CA
Compare Chiropractor 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 Chiropractor 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 Hamid Hassanzadeh, D.C., PA-C's specialty? ▼
Hamid Hassanzadeh, D.C., PA-C specializes in Chiropractor and practices in Red Bluff, California. Credentials: D.C., PA-C.
How much does Hamid Hassanzadeh, D.C., PA-C prescribe under Medicare Part D? ▼
In 2023, Hamid Hassanzadeh, D.C., PA-C wrote 3,622 Medicare Part D claims totaling $271K in drug costs for 514 beneficiaries.
What is Hamid Hassanzadeh, D.C., PA-C's Medicare quality score? ▼
Hamid Hassanzadeh, D.C., PA-C has a CMS MIPS Final Score of 78.3/100 (Quality: 71.3, Cost: 45.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Hamid Hassanzadeh, D.C., PA-C located? ▼
Hamid Hassanzadeh, D.C., PA-C is located at 2450 SISTER MARY COLUMBA DR, Red Bluff, CA, 96080. Phone: (530) 527-0414.
What is Hamid Hassanzadeh, D.C., PA-C's NPI number? ▼
Hamid Hassanzadeh, D.C., PA-C's National Provider Identifier (NPI) is 1326127820, issued on 11/03/2006.
Does Hamid Hassanzadeh, D.C., PA-C prescribe more brand-name or generic drugs? ▼
Hamid Hassanzadeh, D.C., PA-C's prescribing is 12% brand-name and 88% generic drugs by claim count, with $214K in brand drug costs.
How many Chiropractor providers are there in the US? ▼
There are 95,504 Chiropractor providers across 56 states in the US. The average Chiropractor provider writes 824 Medicare Part D claims per year.
What drugs does Hamid Hassanzadeh, D.C., PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Hamid Hassanzadeh, D.C., PA-C's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Hamid Hassanzadeh, D.C., PA-C accept Medicare? ▼
Hamid Hassanzadeh, D.C., PA-C appears in CMS Medicare data with 3,622 Part D claims and 514 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Hamid Hassanzadeh, D.C., PA-C's credentials? ▼
Hamid Hassanzadeh, D.C., PA-C's NPI is 1326127820 with credentials D.C., PA-C. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.