NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1134392251 DO
Verify on CMS → Brian Frenkiewich, DO
Family Medicine Physician in New London, New Hampshire.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,640 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
7K
Medicare Part D claims · 755 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% 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
Brian Frenkiewich, DO filed 7,039 Medicare Part D claims in 2023 as a Family Medicine Physician in New London, New Hampshire, prescribing 88% generic.
- 7K
- Part D claims, 2023
- 88%
- 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.
Brian Frenkiewich, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
7,039 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 certification likely (heuristic, not verified)
Brian Frenkiewich, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Brian Frenkiewich, DO?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
7,039 106% vs specialty avg
Specialty distribution in New Hampshire
How Family Medicine Physician compares to other specialties among New Hampshire 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).
Brian Frenkiewich, DO appears in the CMS NPPES registry as a Family Medicine Physician provider holding DO credentials at 273 COUNTY RD, New London, NH, 03257, with a listed phone of (603) 526-5544. NPI 1134392251 was issued on 04/09/2008.
Medicare Part D records for calendar year 2023 show 7,039 prescription claims written by this provider, covering 755 Medicare beneficiaries and totaling roughly $633K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 4.1%.
Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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 | 1134392251 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 04/09/2008 |
Hospital and facility affiliations
Facilities where Brian Frenkiewich, DO 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.
Mastercare Physical Therapy Inc
Sarasota, FL
The New London Hospital Association Inc
New London, 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).
Brand vs generic prescribing mix · Typical
Brian Frenkiewich, DO - brand share 12.0%
Family Medicine Physician average
12% brand-name claims vs 88% generic, on 7,039 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.
7,039
Total Claims
$633K
Total Drug Cost
755
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 14,794
- Total Day Supply
- 428,369
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $493K
- Generic Drug Cost
- $137K
- Opioid Claims
- 289 (4.1% rate)
- Antibiotic Claims
- 58
Patient Demographics
- Average Patient Age
- 76.0 years
- Avg HCC Risk Score
- 0.92
- Gender Split
- 48% female / 52% male
- Age Distribution
- <65: 27, 65-74: 327, 75-84: 271, 85+: 130
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Brian Frenkiewich, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
532 claims
- Lisinopril
Lisinopril
354 claims
- Amlodipine Besylate
Amlodipine Besylate
315 claims
- Losartan Potassium
Losartan Potassium
273 claims
- Levothyroxine Sodium
Levothyroxine Sodium
250 claims
- Metoprolol Succinate
Metoprolol Succinate
230 claims
- Tamsulosin Hcl 164
Tamsulosin Hcl
164 claims
- Omeprazole 138
Omeprazole
138 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 532 |
| Lisinopril | 354 |
| Amlodipine Besylate | 315 |
| Losartan Potassium | 273 |
| Levothyroxine Sodium | 250 |
| Metoprolol Succinate | 230 |
| Tamsulosin Hcl | 164 |
| Omeprazole | 138 |
| Simvastatin | 135 |
| Hydrochlorothiazide | 131 |
* 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 Brian Frenkiewich, DO fits within the Family Medicine Physician landscape nationally.
147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Brian Frenkiewich, DO's 7,039 claims are above the specialty average of 3,418.
Nearby Family Medicine Physician Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Frenkiewich.
Dr. Lauren Abbott
APRN
Derry, NH
Dr. Peter Abdalla
DO
Concord, NH
Dr. Ruba Abdullah
MD
Concord, NH
Dr. Iryna Aberkorn
MD
Lebanon, NH
Dr. Bruce Abramowitz
DO
Windham, NH
Compare Family Medicine 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 New Hampshire medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore New Hampshire
Frequently Asked Questions
What is Brian Frenkiewich, DO's specialty? ▼
Brian Frenkiewich, DO specializes in Family Medicine Physician and practices in New London, New Hampshire. Credentials: DO.
How much does Brian Frenkiewich, DO prescribe under Medicare Part D? ▼
In 2023, Brian Frenkiewich, DO wrote 7,039 Medicare Part D claims totaling $633K in drug costs for 755 beneficiaries.
Where is Brian Frenkiewich, DO located? ▼
Brian Frenkiewich, DO is located at 273 COUNTY RD, New London, NH, 03257. Phone: (603) 526-5544.
What is Brian Frenkiewich, DO's NPI number? ▼
Brian Frenkiewich, DO's National Provider Identifier (NPI) is 1134392251, issued on 04/09/2008.
Does Brian Frenkiewich, DO prescribe more brand-name or generic drugs? ▼
Brian Frenkiewich, DO's prescribing is 12% brand-name and 88% generic drugs by claim count, with $493K in brand drug costs.
Does Brian Frenkiewich, DO prescribe opioids? ▼
Yes, Brian Frenkiewich, DO had 289 opioid claims in 2023 with an opioid prescribing rate of 4.1%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,640 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 Brian Frenkiewich, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Brian Frenkiewich, DO's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Brian Frenkiewich, DO accept Medicare? ▼
Brian Frenkiewich, DO appears in CMS Medicare data with 7,039 Part D claims and 755 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Brian Frenkiewich, DO's credentials? ▼
Brian Frenkiewich, DO's NPI is 1134392251 with credentials DO. 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.