NPI registry status
Active
2026 NPPES data Urology Physician NPI 1821157033 D.O.
Verify on CMS → John Grimaldi, D.O.
Urology Physician in Chula Vista, 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 13,606 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
6K
Medicare Part D claims · 1K beneficiaries · Urology Physician avg: 1K
Generic prescribing
99%
generic claims · 1% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
75/100
CMS neutral threshold · no category scores published
Industry payments
$229.49
6 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Grimaldi, D.O. carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 5,752 Medicare Part D claims in 2024.
- 75/100
- CMS neutral score · not measured
- 6K
- Part D claims, 2024
- 99%
- 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.
Federal trust snapshot
What official records show about John Grimaldi, D.O.
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 1821157033), first enumerated 12/06/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 5,752 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
CMS assigned a neutral MIPS final score of 75/100 where no performance category was scored — not a measured quality rank.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Industry payment transparency
$229.49 in reported industry payments (6 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not John Grimaldi, D.O.'s individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- 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.
CMS NPPES provider registry desk
NPI 1821157033 · Urology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-NEUTRAL · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1821157033
- ENUM-LEGACY 2006
- TAX-MID 14K Urology Physician
- MIPS-NEUTRAL 75/100
- RX-MID 5,752
- BOOK-LIGHT 1,421 in California
- PHOTO-ENUM Scott Kantor · 2006
John Grimaldi, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
5,752 ≥ 95th percentile 95% 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 certification likely (heuristic, not verified)
John Grimaldi, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 John Grimaldi, D.O.?
CMS neutral score, not measuredPrimary specialty
Urology Physician
Medicare Part D claims
5,752 325% vs specialty avg
MIPS final score
75/100
Specialty distribution in California
How Urology Physician compares to other specialties among California providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
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 | 1821157033 |
|---|---|
| Specialty | Urology Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 12/06/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Individual
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 John Grimaldi, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$229
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.
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 John Grimaldi, D.O.. To verify John Grimaldi, D.O.'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
John Grimaldi, D.O. - brand share 1.0%
Urology Physician average
1% brand-name claims vs 99% generic, on 5,752 2024 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 2024.
5,752
Total Claims
$275K
Total Drug Cost
1,369
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 9,837.767
- Total Day Supply
- 225,102
- Brand vs Generic
- 1% brand / 99% generic
- Brand Drug Cost
- $143K
- Generic Drug Cost
- $132K
- Opioid Claims
- 583 (10.1% rate)
- Antibiotic Claims
- 999
Patient Demographics
- Average Patient Age
- 74.8 years
- Avg HCC Risk Score
- 1.70
- Gender Split
- 29% female / 71% male
- Age Distribution
- <65: 81, 65-74: 621, 75-84: 492, 85+: 175
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Grimaldi, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Tamsulosin Hcl
Tamsulosin Hcl
1,075 claims
- Estradiol
Estradiol
850 claims
- Sulfamethoxazole-T…
Sulfamethoxazole-Trimethoprim
795 claims
- Ibuprofen
Ibuprofen
591 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
552 claims
- Zolpidem Tartrate
Zolpidem Tartrate
517 claims
- Finasteride 286
Finasteride
286 claims
- Oxybutynin Chloride 221
Oxybutynin Chloride
221 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 1,075 |
| Estradiol | 850 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 795 |
| Ibuprofen | 591 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 552 |
| Zolpidem Tartrate | 517 |
| Finasteride | 286 |
| Oxybutynin Chloride | 221 |
| Testosterone Cypionate | 155 |
| Bicalutamide | 88 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Urology Physician Overview
How John Grimaldi, D.O. fits within the Urology Physician landscape nationally.
13,606
Urology Physician Providers in US
54
States with Urology Physician
1,354
Avg Claims per Provider
John Grimaldi, D.O.'s 5,752 claims are above the specialty average of 1,354.
Nationwide Urology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Grimaldi, both outside California so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Urology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Grimaldi.
One of 1,421 Urology Physician providers enrolled in California, 5 are shown here.
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 →
Frequently Asked Questions
What is John Grimaldi, D.O.'s specialty? ▼
John Grimaldi, D.O. specializes in Urology Physician and practices in Chula Vista, California. Credentials: D.O..
How much does John Grimaldi, D.O. prescribe under Medicare Part D? ▼
In 2024, John Grimaldi, D.O. wrote 5,752 Medicare Part D claims totaling $275K in drug costs for 1,369 beneficiaries.
What is John Grimaldi, D.O.'s Medicare quality score? ▼
John Grimaldi, D.O. has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is John Grimaldi, D.O. located? ▼
John Grimaldi, D.O. is located at 450 4TH AVE, Chula Vista, CA, 91910. Phone: (619) 420-0201.
What is John Grimaldi, D.O.'s NPI number? ▼
John Grimaldi, D.O.'s National Provider Identifier (NPI) is 1821157033, issued on 12/06/2006.
Does John Grimaldi, D.O. prescribe more brand-name or generic drugs? ▼
John Grimaldi, D.O.'s prescribing is 1% brand-name and 99% generic drugs by claim count, with $143K in brand drug costs.
Does John Grimaldi, D.O. prescribe opioids? ▼
Yes, John Grimaldi, D.O. had 583 opioid claims in 2024 with an opioid prescribing rate of 10.1%.
How many Urology Physician providers are there in the US? ▼
There are 13,606 Urology Physician providers across 54 states in the US. The average Urology Physician provider writes 1,354 Medicare Part D claims per year.
What drugs does John Grimaldi, D.O. prescribe most often? ▼
Based on 2024 Medicare Part D data, John Grimaldi, D.O.'s most frequently prescribed drugs include Tamsulosin Hcl, Estradiol, Sulfamethoxazole-Trimethoprim. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Grimaldi, D.O. accept Medicare? ▼
John Grimaldi, D.O. appears in CMS Medicare data with 5,752 Part D claims and 1,369 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Grimaldi, D.O.'s credentials? ▼
John Grimaldi, D.O.'s NPI is 1821157033 with credentials D.O.. 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.
- 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 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 August 2026.