NPI registry status
Active
2026 NPPES data Obstetrics & Gynecology Physician NPI 1184682940 MD
Verify on CMS → Karen Niver, MD
Obstetrics & Gynecology Physician in Port Huron, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 44,326 in Obstetrics & Gynecology 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
108
Medicare Part D claims · 37 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Karen Niver, MD filed 108 Medicare Part D claims in 2023 as an Obstetrics & Gynecology Physician in Port Huron, Michigan, prescribing 83% generic.
- 108
- Part D claims, 2023
- 83%
- generic prescribing
- ≥35th
- 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.
Federal trust snapshot
What official records show about Karen Niver, MD
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 1184682940), first enumerated 05/02/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 108 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- State context
State board disciplinary context
Michigan statewide board action statistics are published annually — these figures describe aggregate state activity, not Karen Niver, MD's individual license status. Verify directly with the state medical board.
Source: MI-BOM 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 1184682940 · Obstetrics & Gynecology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1184682940
- ENUM-LEGACY 2006
- TAX-MID 44K Obstetrics &
- RX-LIGHT 108
- BOOK-LIGHT 1,681 in Michigan
- PHOTO-ENUM Thomas Moore · 2006
Karen Niver, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
108 ≥ 35th percentile 35% 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-eligible specialty (heuristic, not verified)
Karen Niver, MD 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 Karen Niver, MD?
Quality data not reportedPrimary specialty
Obstetrics & Gynecology Physician
Medicare Part D claims
108 40% vs specialty avg
Specialty distribution in Michigan
How Obstetrics & Gynecology Physician compares to other specialties among Michigan 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 Obstetrics & Gynecology 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 | 1184682940 |
|---|---|
| Specialty | Obstetrics & Gynecology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/02/2006 |
License & disciplinary context - Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 - they are NOT specific to Karen Niver, MD. To verify Karen Niver, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Karen Niver, MD - brand share 17.0%
Obstetrics & Gynecology Physician average
17% brand-name claims vs 83% generic, on 108 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.
108
Total Claims
$17K
Total Drug Cost
37
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 198
- Total Day Supply
- 5,501
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $8K
- Generic Drug Cost
- $9K
- Antibiotic Claims
- 11
Patient Demographics
- Average Patient Age
- 70.1 years
- Avg HCC Risk Score
- 1.02
- Gender Split
- 100% female / 0% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Karen Niver, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Estradiol
Estradiol
15 claims
- Myrbetriq
Myrbetriq
11 claims
- Yuvafem
Yuvafem
11 claims
| Drug | Claims |
|---|---|
| Estradiol | 15 |
| Myrbetriq Mirabegron | 11 |
| Yuvafem Estradiol | 11 |
| Progesterone "Progesterone | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Obstetrics & Gynecology Physician Overview
How Karen Niver, MD fits within the Obstetrics & Gynecology Physician landscape nationally.
44,326
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider
Karen Niver, MD's 108 claims are below the specialty average of 179.
Nationwide Obstetrics & Gynecology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Niver, both outside Michigan 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 Obstetrics & Gynecology Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Niver.
One of 1,681 Obstetrics & Gynecology Physician providers enrolled in Michigan, 5 are shown here.
Dr. Bryan Aaron
MD
Ann Arbor, MI
Dr. Mushtak Abbou
MD
Royal Oak, MI
Dr. Youstina Abdallah
MD
Grand Rapids, MI
Dr. Adib Abdelrahman
D.O.
Pontiac, MI
Dr. Anan Abdelrahman
MD
Pontiac, MI
Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Karen Niver, MD's specialty? ▼
Karen Niver, MD specializes in Obstetrics & Gynecology Physician and practices in Port Huron, Michigan. Credentials: MD.
How much does Karen Niver, MD prescribe under Medicare Part D? ▼
In 2023, Karen Niver, MD wrote 108 Medicare Part D claims totaling $17K in drug costs for 37 beneficiaries.
Where is Karen Niver, MD located? ▼
Karen Niver, MD is located at 1206 WASHINGTON AVE, Port Huron, MI, 48060. Phone: (810) 984-3100.
What is Karen Niver, MD's NPI number? ▼
Karen Niver, MD's National Provider Identifier (NPI) is 1184682940, issued on 05/02/2006.
Does Karen Niver, MD prescribe more brand-name or generic drugs? ▼
Karen Niver, MD's prescribing is 17% brand-name and 83% generic drugs by claim count, with $8K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US? ▼
There are 44,326 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does Karen Niver, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Karen Niver, MD's most frequently prescribed drugs include Estradiol, Myrbetriq, Yuvafem. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Karen Niver, MD accept Medicare? ▼
Karen Niver, MD appears in CMS Medicare data with 108 Part D claims and 37 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karen Niver, MD's credentials? ▼
Karen Niver, MD's NPI is 1184682940 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.