NPI registry status
Active
2026 NPPES data Reproductive Endocrinology Physician NPI 1477550036 MD
Verify on CMS → John Nulsen, MD
Reproductive Endocrinology Physician in Farmington, Connecticut.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,468 in Reproductive Endocrinology 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
12
Medicare Part D claims · Reproductive Endocrinology Physician avg: 118
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Nulsen, MD filed 12 Medicare Part D claims in 2024 as a Reproductive Endocrinology Physician in Farmington, Connecticut.
- 12
- Part D claims, 2024
- ≥0th
- 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 John Nulsen, 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 1477550036), first enumerated 06/28/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 12 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.
- 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 1477550036 · Reproductive Endocrinology Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1477550036
- ENUM-LEGACY 2005
- TAX-NARROW 1,468
- RX-TRACE 12
- BOOK-THIN 39 in Connecticut
- PHOTO-ENUM Joseph Hochman, M.D., · 2005
John Nulsen, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
12 ≥ 0th percentile 0% 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-eligible specialty (heuristic, not verified)
John Nulsen, 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 John Nulsen, MD?
Quality data not reportedPrimary specialty
Reproductive Endocrinology Physician
Medicare Part D claims
12 90% vs specialty avg
Specialty distribution in Connecticut
How Reproductive Endocrinology Physician compares to other specialties among Connecticut 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 Reproductive Endocrinology 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 | 1477550036 |
|---|---|
| Specialty | Reproductive Endocrinology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/28/2005 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
12
Total Claims
$36
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12
- Total Day Supply
- 296
- Brand Drug Cost
- $0
- Generic Drug Cost
- $36
Patient Demographics
- Average Patient Age
- 75.5 years
- Avg HCC Risk Score
- 0.79
More Reproductive Endocrinology Physician in CT →
All providers in Connecticut →
Compare specialties →
Reproductive Endocrinology Physician Overview
How John Nulsen, MD fits within the Reproductive Endocrinology Physician landscape nationally.
1,468
Reproductive Endocrinology Physician Providers in US
47
States with Reproductive Endocrinology Physician
118
Avg Claims per Provider
John Nulsen, MD's 12 claims are below the specialty average of 118.
Nationwide Reproductive Endocrinology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Nulsen, both outside Connecticut so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Reproductive Endocrinology Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Nulsen.
One of 39 Reproductive Endocrinology Physician providers enrolled in Connecticut, 5 are shown here.
Dr. Asima Ahmad
MD, MPH
New Haven, CT
Dr. Aydin Arici
MD
New Haven, CT
Dr. Christopher Arkfeld
MD
New Haven, CT
Dr. Claudio Benadiva
M.D.
Farmington, CT
Dr. Sandra Carson
MD
New Haven, CT
Compare Reproductive Endocrinology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Nulsen, MD's specialty? ▼
John Nulsen, MD specializes in Reproductive Endocrinology Physician and practices in Farmington, Connecticut. Credentials: MD.
How much does John Nulsen, MD prescribe under Medicare Part D? ▼
In 2024, John Nulsen, MD wrote 12 Medicare Part D claims totaling $36 in drug costs for N/A beneficiaries.
Where is John Nulsen, MD located? ▼
John Nulsen, MD is located at 2 BATTERSON PARK RD, Farmington, CT, 06032. Phone: (860) 679-7503.
What is John Nulsen, MD's NPI number? ▼
John Nulsen, MD's National Provider Identifier (NPI) is 1477550036, issued on 06/28/2005.
How many Reproductive Endocrinology Physician providers are there in the US? ▼
There are 1,468 Reproductive Endocrinology Physician providers across 47 states in the US. The average Reproductive Endocrinology Physician provider writes 118 Medicare Part D claims per year.
Does John Nulsen, MD accept Medicare? ▼
John Nulsen, MD appears in CMS Medicare data with 12 Part D claims and N/A Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Nulsen, MD's credentials? ▼
John Nulsen, MD's NPI is 1477550036 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 (2024). 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 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.