NPI registry status
Active
2026 NPPES data Hospice and Palliative Medicine (Internal Medicine) Physician NPI 1104062173 D.O.
Verify on CMS → Irina Kolomey, D.O.
Hospice and Palliative Medicine (Internal Medicine) Physician in Walnut Creek, 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 1,524 in Hospice and Palliative Medicine (Internal Medicine) 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 · 621 beneficiaries · Hospice and Palliative Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$812.42
25 payments · CMS Open Payments (Sunshine Act)
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
Irina Kolomey, D.O. filed 6,495 Medicare Part D claims in 2023 as a Hospice and Palliative Medicine (Internal Medicine) Physician in Walnut Creek, California, prescribing 87% generic.
- 6K
- Part D claims, 2023
- 87%
- generic prescribing
- $812.42
- industry payments (Sunshine Act)
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.
Irina Kolomey, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,495 Top 4% higher than 96% 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)
Irina Kolomey, D.O. 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 Irina Kolomey, D.O.?
Quality data not reportedPrimary specialty
Hospice and Palliative Medicine (Internal Medicine) Physician
Medicare Part D claims
6,495 5× vs specialty avg
Specialty distribution in California
How Hospice and Palliative Medicine (Internal Medicine) 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 Hospice and Palliative Medicine (Internal Medicine) 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).
Irina Kolomey, D.O. appears in the CMS NPPES registry as a Hospice and Palliative Medicine (Internal Medicine) Physician provider holding D.O. credentials at 1804 SAN MIGUEL DR, Walnut Creek, CA, 94596, with a listed phone of (925) 363-3395. NPI 1104062173 was issued on 12/22/2008.
Medicare Part D records for calendar year 2023 show 6,495 prescription claims written by this provider, covering 621 Medicare beneficiaries and totaling roughly $845K in drug spend, split 13% brand-name and 87% generic by claim count, with an opioid prescribing rate of 3.1%.
Hospice and Palliative Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 1,524 enrolled providers across 51 states and an average of 1,275 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 | 1104062173 |
|---|---|
| Specialty | Hospice and Palliative Medicine (Internal Medicine) Physician |
| Credentials | D.O. |
| Gender | Female |
| NPI Issued | 12/22/2008 |
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 Irina Kolomey, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$812
Largest payer
Lilly USA, LLC
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 Irina Kolomey, D.O.. To verify Irina Kolomey, 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 · Typical
Irina Kolomey, D.O. - brand share 13.0%
Hospice and Palliative Medicine (Internal Medicine) Physician average
13% brand-name claims vs 87% generic, on 6,495 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.
6,495
Total Claims
$845K
Total Drug Cost
621
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 14,163
- Total Day Supply
- 412,054
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $677K
- Generic Drug Cost
- $165K
- Opioid Claims
- 202 (3.1% rate)
- Antibiotic Claims
- 136
Patient Demographics
- Average Patient Age
- 74.3 years
- Avg HCC Risk Score
- 1.62
- Gender Split
- 72% female / 28% male
- Age Distribution
- <65: 74, 65-74: 237, 75-84: 216, 85+: 94
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Irina Kolomey, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
454 claims
- Amlodipine Besylate
Amlodipine Besylate
277 claims
- Lisinopril
Lisinopril
226 claims
- Levothyroxine Sodium
Levothyroxine Sodium
225 claims
- Metformin Hcl
Metformin Hcl
219 claims
- Gabapentin 172
Gabapentin
172 claims
- Ozempic 165
Ozempic
165 claims
- Trazodone Hcl 163
Trazodone Hcl
163 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 454 |
| Amlodipine Besylate | 277 |
| Lisinopril | 226 |
| Levothyroxine Sodium | 225 |
| Metformin Hcl | 219 |
| Gabapentin | 172 |
| Ozempic Semaglutide | 165 |
| Trazodone Hcl | 163 |
| Losartan Potassium | 145 |
| Hydrochlorothiazide | 141 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hospice and Palliative Medicine (Internal Medicine) Physician in CA →
All providers in California →
Compare specialties →
Hospice and Palliative Medicine (Internal Medicine) Physician Overview
How Irina Kolomey, D.O. fits within the Hospice and Palliative Medicine (Internal Medicine) Physician landscape nationally.
1,524
Hospice and Palliative Medicine (Internal Medicine) Physician Providers in US
51
States with Hospice and Palliative Medicine (Internal Medicine) Physician
1,275
Avg Claims per Provider
Irina Kolomey, D.O.'s 6,495 claims are above the specialty average of 1,275.
Nearby Hospice and Palliative Medicine (Internal Medicine) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Kolomey.
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 Hospice and Palliative Medicine (Internal Medicine) 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 Irina Kolomey, D.O.'s specialty? ▼
Irina Kolomey, D.O. specializes in Hospice and Palliative Medicine (Internal Medicine) Physician and practices in Walnut Creek, California. Credentials: D.O..
How much does Irina Kolomey, D.O. prescribe under Medicare Part D? ▼
In 2023, Irina Kolomey, D.O. wrote 6,495 Medicare Part D claims totaling $845K in drug costs for 621 beneficiaries.
Where is Irina Kolomey, D.O. located? ▼
Irina Kolomey, D.O. is located at 1804 SAN MIGUEL DR, Walnut Creek, CA, 94596. Phone: (925) 363-3395.
What is Irina Kolomey, D.O.'s NPI number? ▼
Irina Kolomey, D.O.'s National Provider Identifier (NPI) is 1104062173, issued on 12/22/2008.
Does Irina Kolomey, D.O. prescribe more brand-name or generic drugs? ▼
Irina Kolomey, D.O.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $677K in brand drug costs.
Does Irina Kolomey, D.O. prescribe opioids? ▼
Yes, Irina Kolomey, D.O. had 202 opioid claims in 2023 with an opioid prescribing rate of 3.1%.
How many Hospice and Palliative Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 1,524 Hospice and Palliative Medicine (Internal Medicine) Physician providers across 51 states in the US. The average Hospice and Palliative Medicine (Internal Medicine) Physician provider writes 1,275 Medicare Part D claims per year.
What drugs does Irina Kolomey, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Irina Kolomey, D.O.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Irina Kolomey, D.O. accept Medicare? ▼
Irina Kolomey, D.O. appears in CMS Medicare data with 6,495 Part D claims and 621 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Irina Kolomey, D.O.'s credentials? ▼
Irina Kolomey, D.O.'s NPI is 1104062173 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 (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.