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ALAN M NELSON M.D.
NPI 1720006117
Internal Medicine in Bridgeport, CT

Active since July 17, 2006PECOS Enrolled
85.07/100
CMS Quality Rating
4641 MAIN ST STE 1, BRIDGEPORT, CT 06606(203) 374-4966(203) 371-7024 Get Directions Write a Review

NPPES record last updated: December 6, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Alan M Nelson M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALAN M NELSON M.D. (NPI 1720006117) is an individual internal medicine provider in Bridgeport, Connecticut, licensed in Connecticut (019537) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1720006117
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameALAN M NELSONCredential: M.D.
Location Address4641 MAIN ST STE 1Bridgeport, CT 06606-1827
Mailing Address4641 Main St Ste 1Bridgeport, CT 06606-1827 · (203) 374-4966 · Fax (203) 371-7024
Phone(203) 374-4966
Fax(203) 371-7024
Sole ProprietorNo
Enumeration DateJuly 17, 2006
Last NPPES UpdateDecember 6, 2022
NPPES CertifiedDecember 6, 2022
✔ NPI 1720006117 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CT · 019537
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedSpecialistTaxonomy 174400000X · License 019537 (CT)
4641 MAIN ST STE 1, Bridgeport, CT 06606
Open in Google Maps ↗

Other Identifiers 1

Medicaid001195379CT

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alan M Nelson M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Alan Nelson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Connecticut Gi PLLC
46 mi
Gastroenterology
85 SEYMOUR ST, 1000
Hartford, CT 06106
  • Reassigned Medicare billing, Connecticut enrollment
  • 417 clinicians in this Medicare group
NPI 1023124625 (860) 246-2571

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, vedolizumab, intravenous, 1 mg J3380
Vedolizumab is a medication given via injection. It's used to treat certain bowel conditions (such as Crohn's disease, ulcerative colitis) by reducing inflammation. It works by blocking a certain protein that causes this inflammation.
13,800 services14 patients
Injection, ferric carboxymaltose, 1 mg J1439
Ferric carboxymaltose is an iron supplement injection. It's given when your body needs more iron than you can consume through diet, like in anemia. The injection is administered by a healthcare professional into a vein.
12,750 services12 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
293 services114 patients
Infusion, normal saline solution, 250 cc J7050
An infusion of normal saline solution, 250 cc, involves administering a sterile saltwater solution into your body through a vein, usually in your arm. This helps to replenish fluids, maintain hydration, and balance electrolytes in your body.
90 services35 patients
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365
This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.
65 services26 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
50 services43 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06606 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

85.07/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality89.7
Promoting Interoperability83
Improvement Activities40
Cost68.33

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers14 claims36 services$5.39 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

FAIRFIELD COUNTY INTERNAL MEDICINE AND GASTROENTEROLOGY ASSOCIATES PC
Specialist
4641 MAIN ST STE 1
BRIDGEPORT, CT 06606
Greater Bridgeport Planning Region (203) 374-4966
RICHARD J LINK M.D.
Specialist
4641 MAIN ST STE 1
BRIDGEPORT, CT 06606
Greater Bridgeport Planning Region (203) 374-4966

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alan Nelson's NPI number?

The NPI number for Alan Nelson is 1720006117. It was assigned to this individual provider in the NPPES registry on July 17, 2006.

Where is Alan Nelson located?

Alan Nelson practices at 4641 Main St Ste 1, Bridgeport, CT 06606. The listed phone number is (203) 374-4966.

What is Alan Nelson's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Alan Nelson enrolled in Medicare?

Yes. Alan Nelson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alan Nelson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alan Nelson reassigns Medicare benefits to Connecticut Gi PLLC (Hartford, CT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alan Nelson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Alan Nelson was last updated on December 6, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.