NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1942257951 MD
Verify on CMS → Flavia Constantin, MD
Family Medicine Physician in Renton, Washington.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family 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
3K
Medicare Part D claims · 245 beneficiaries · Family Medicine Physician avg: 3K
What the federal data shows
Flavia Constantin, MD filed 3,009 Medicare Part D claims in 2023 as a Family Medicine Physician in Renton, Washington.
- 3K
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥89th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1942257951 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1942257951
- ENUM-LEGACY 2006
- TAX-MEGA 148K Family Medicine
- RX-MID 3,009
- BOOK-MID 5,197 in Washington
- PHOTO-ENUM Ahmed El-Ghoneimy · 2006
Flavia Constantin, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,009 ≥ 89th percentile 89% of 1,370,886 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 · 2023
✓
Board certification likely (heuristic, not verified)
Flavia Constantin, 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 Flavia Constantin, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
3,009 12% vs specialty avg
Specialty distribution in Washington
How Family Medicine Physician compares to other specialties among Washington 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 Family 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).
Practice Address
Provider Details
| NPI | 1942257951 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/27/2006 |
Hospital and facility affiliations
Facilities where Flavia Constantin, 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.
Swedish Health Services
Renton, WA
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 - Washington WMC 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 ~34K Washington medical licensees in 2023 - they are NOT specific to Flavia Constantin, MD. To verify Flavia Constantin, MD's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC 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 Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
3,009
Total Claims
$290K
Total Drug Cost
245
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,608
- Total Day Supply
- 222,922
- Generic Drug Cost
- $49K
- Opioid Claims
- 48 (1.6% rate)
- Antibiotic Claims
- 59
Patient Demographics
- Average Patient Age
- 70.8 years
- Avg HCC Risk Score
- 0.90
- Gender Split
- 85% female / 15% male
- Age Distribution
- <65: 22, 65-74: 149, 75-84: 60, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Flavia Constantin, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
346 claims
- Lisinopril
Lisinopril
171 claims
- Levothyroxine Sodium
Levothyroxine Sodium
168 claims
- Losartan Potassium 134
Losartan Potassium
134 claims
- Amlodipine Besylate 127
Amlodipine Besylate
127 claims
- Metformin Hcl Er 89
Metformin Hcl Er
89 claims
- Metoprolol Succinate 74
Metoprolol Succinate
74 claims
- Gabapentin 71
Gabapentin
71 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 346 |
| Lisinopril | 171 |
| Levothyroxine Sodium | 168 |
| Losartan Potassium | 134 |
| Amlodipine Besylate | 127 |
| Metformin Hcl Er Metformin Hcl | 89 |
| Metoprolol Succinate | 74 |
| Gabapentin | 71 |
| Alendronate Sodium | 59 |
| Metformin Hcl | 57 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Flavia Constantin, MD fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Flavia Constantin, MD's 3,009 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Constantin, both outside Washington so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Constantin.
One of 5,197 Family Medicine Physician providers enrolled in Washington, 5 are shown here.
Dr. Shawn Aaron
MD
Longview, WA
Dr. John Abano
M.D.
Shoreline, WA
Dr. Sarah Abbot
DO
Kirkland, WA
Dr. Arthur Abbott
M.D.
Seattle, WA
Dr. Dale Abbott
MD
Burlington, WA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Flavia Constantin, MD's specialty? ▼
Flavia Constantin, MD specializes in Family Medicine Physician and practices in Renton, Washington. Credentials: MD.
How much does Flavia Constantin, MD prescribe under Medicare Part D? ▼
In 2023, Flavia Constantin, MD wrote 3,009 Medicare Part D claims totaling $290K in drug costs for 245 beneficiaries.
Where is Flavia Constantin, MD located? ▼
Flavia Constantin, MD is located at 911 N 10TH PL, Renton, WA, 98057. Phone: (425) 391-5700.
What is Flavia Constantin, MD's NPI number? ▼
Flavia Constantin, MD's National Provider Identifier (NPI) is 1942257951, issued on 05/27/2006.
Does Flavia Constantin, MD prescribe opioids? ▼
Yes, Flavia Constantin, MD had 48 opioid claims in 2023 with an opioid prescribing rate of 1.6%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Flavia Constantin, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Flavia Constantin, MD'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 Flavia Constantin, MD accept Medicare? ▼
Flavia Constantin, MD appears in CMS Medicare data with 3,009 Part D claims and 245 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Flavia Constantin, MD's credentials? ▼
Flavia Constantin, MD's NPI is 1942257951 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
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.