NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1801960901 MD
Verify on CMS → Wolf Erlich, MD
Endocrinology, Diabetes & Metabolism Physician in Wallingford, 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 7,852 in Endocrinology, Diabetes & Metabolism 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
4K
Medicare Part D claims · 465 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
61%
generic claims · 33% 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
Wolf Erlich, MD filed 4,257 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Wallingford, Connecticut, prescribing 61% generic.
- 4K
- Part D claims, 2023
- 61%
- generic prescribing
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.
Wolf Erlich, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
4,257 Top 8% higher than 92% 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)
Wolf Erlich, 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 Wolf Erlich, MD?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
4,257 61% vs specialty avg
Specialty distribution in Connecticut
How Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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).
Wolf Erlich, MD appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 950 YALE AVE, Wallingford, CT, 06492, with a listed phone of (203) 679-4296. NPI 1801960901 was issued on 11/20/2006.
Medicare Part D records for calendar year 2023 show 4,257 prescription claims written by this provider, covering 465 Medicare beneficiaries and totaling roughly $1.5 million in drug spend, split 33% brand-name and 61% generic by claim count.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,852 enrolled providers across 54 states and an average of 2,639 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 | 1801960901 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/20/2006 |
Brand vs generic prescribing mix · Above average
Wolf Erlich, MD - brand share 33.0%
Endocrinology, Diabetes & Metabolism Physician average
33% brand-name claims vs 61% generic, on 4,257 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.
4,257
Total Claims
$1.5M
Total Drug Cost
465
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 11,121
- Total Day Supply
- 331,288
- Brand vs Generic
- 33% brand / 61% generic
- Brand Drug Cost
- $1.3M
- Generic Drug Cost
- $87K
- Antibiotic Claims
- 22
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 1.48
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 49, 65-74: 210, 75-84: 162, 85+: 44
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Wolf Erlich, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
782 claims
- Atorvastatin Calcium 223
Atorvastatin Calcium
223 claims
- Metformin Hcl Er 206
Metformin Hcl Er
206 claims
- Glimepiride 180
Glimepiride
180 claims
- Metformin Hcl 151
Metformin Hcl
151 claims
- Novolog Flexpen 149
Novolog Flexpen
149 claims
- Ozempic 144
Ozempic
144 claims
- Humalog Kwikpen U-… 137
Humalog Kwikpen U-100
137 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 782 |
| Atorvastatin Calcium | 223 |
| Metformin Hcl Er Metformin Hcl | 206 |
| Glimepiride | 180 |
| Metformin Hcl | 151 |
| Novolog Flexpen Insulin Aspart | 149 |
| Ozempic Semaglutide | 144 |
| Humalog Kwikpen U-100 Insulin Lispro | 137 |
| Levemir Flexpen Insulin Detemir | 122 |
| Jardiance Empagliflozin | 106 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in CT →
All providers in Connecticut →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Wolf Erlich, MD fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,852
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Wolf Erlich, MD's 4,257 claims are above the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Erlich.
Dr. Fadi Al-Khayer
MD
Storrs, CT
Dr. Vivek Alaigh
MD
Stamford, CT
Dr. Kenda Alkwatli
MD
Wethersfield, CT
Dr. Ipek Alpertunga
MD
Hartford, CT
Dr. Helen Anaedo
M.D
Plainville, CT
Compare Endocrinology, Diabetes & Metabolism 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 Connecticut medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Endocrinology, Diabetes & Metabolism 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 Wolf Erlich, MD's specialty? ▼
Wolf Erlich, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Wallingford, Connecticut. Credentials: MD.
How much does Wolf Erlich, MD prescribe under Medicare Part D? ▼
In 2023, Wolf Erlich, MD wrote 4,257 Medicare Part D claims totaling $1.5M in drug costs for 465 beneficiaries.
Where is Wolf Erlich, MD located? ▼
Wolf Erlich, MD is located at 950 YALE AVE, Wallingford, CT, 06492. Phone: (203) 679-4296.
What is Wolf Erlich, MD's NPI number? ▼
Wolf Erlich, MD's National Provider Identifier (NPI) is 1801960901, issued on 11/20/2006.
Does Wolf Erlich, MD prescribe more brand-name or generic drugs? ▼
Wolf Erlich, MD's prescribing is 33% brand-name and 61% generic drugs by claim count, with $1.3M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,852 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Wolf Erlich, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Wolf Erlich, MD's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Metformin Hcl Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Wolf Erlich, MD accept Medicare? ▼
Wolf Erlich, MD appears in CMS Medicare data with 4,257 Part D claims and 465 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Wolf Erlich, MD's credentials? ▼
Wolf Erlich, MD's NPI is 1801960901 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
Compiled from official public sources by the PlainDoctor editorial team.