DR. CHARLES T ZENZEN MD
NPI 1265448930
Ophthalmology in Grand Blanc, MI

Q: What is Charles Zenzen's NPI number?

The NPI number for Charles Zenzen is 1265448930. It was assigned to this individual provider in the NPPES registry on August 1, 2006.

Q: What is Charles Zenzen's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Q: When was this NPI record last updated?

The NPPES record for Charles Zenzen was last updated on September 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since August 01, 2006PECOS EnrolledAccepts Medicare Assignment

78.03/100

CMS Quality Rating

2240 E HILL RD, GRAND BLANC, MI 48439(810) 579-0202(810) 579-0204 Get Directions Write a Review

NPPES record last updated: September 28, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 28, 2022, Aug 3, 2022, May 16, 2022 and 1 more (4 updates tracked since 2019).

On this page

About Dr. Charles T Zenzen Md NPPES

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

DR. CHARLES T ZENZEN MD (NPI 1265448930) is an individual ophthalmology provider in Grand Blanc, Michigan, licensed in Michigan (4301074506) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Wayne State University School Of Medicine (1999).

NPPES Registry Identity

NPI1265448930

Entity TypeIndividualMale

Primary Taxonomy207W00000X

Provider Legal NameDR. CHARLES T ZENZENCredential: MD

Location Address2240 E HILL RDGrand Blanc, MI 48439-5420

Mailing Address30150 Telegraph Rd Ste 271Bingham Farms, MI 48025-4521 · (248) 395-5166 · Fax (734) 743-2138

Phone(810) 579-0202

Fax(810) 579-0204

Sole ProprietorNo

Medical School CMSWayne State University School Of MedicineGraduated 1999

Enumeration DateAugust 1, 2006

Last NPPES UpdateSeptember 28, 20224 updates tracked since enumeration

NPPES CertifiedSeptember 28, 2022

✔ NPI 1265448930 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians

Taxonomy Code207W00000X

License✔ Licensed in MI · 4301074506

Definition

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

2240 E HILL RD, Grand Blanc, MI 48439

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Charles T Zenzen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2769475078

PECOS Enrollment IDI20040405000320

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 Charles Zenzen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Michigan Ophthalmology Specialists, PLLC

39 mi

Ophthalmology

33400 6 MILE RD
Livonia, MI 48152

Reassigned Medicare billing, Michigan enrollment
29 clinicians in this Medicare group

NPI 1942272364 (734) 421-2020

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 17

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

373 services261 patients

Exam of visual field with extended testing 92083

An extended visual field exam is a detailed test to evaluate your peripheral (side) vision. It helps to detect any potential blind spots which may not be noticeable in daily life. These could be caused by eye diseases like glaucoma, or neurological conditions.

170 services167 patients

Imaging of optic nerve 92133

Imaging of the optic nerve is a non-invasive procedure that captures detailed pictures of your optic nerve. It helps doctors assess eye health, particularly for conditions like glaucoma. It's painless, quick, and uses safe technology like MRI or OCT (Optical Coherence Tomography).

170 services164 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.

151 services140 patients

Measurement of corneal curvature and depth of eye 92136

This procedure measures the shape and depth of your eye, specifically the cornea, the clear front surface. It helps in diagnosing conditions, planning for surgeries, or fitting contact lenses. It's non-invasive and painless.

128 services76 patients

Established patient complete exam of visual system 92014

An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.

125 services123 patients

Removal of cataract with insertion of prosthetic lens 66984

This is a procedure where a cloudy lens in your eye, known as a cataract, is removed. After removal, a clear artificial lens is inserted. This helps to restore your vision, enabling you to see clearly again.

115 services67 patients

Imaging of retina 92134

Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.

106 services96 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

74 services74 patients

Closure of tear duct opening using plug 68761

Closure of the tear duct opening using a plug is a procedure to address excessive tear production. A small device is inserted into the tear duct to block it, reducing tear flow and relieving symptoms. This is a safe, reversible process, often performed in-office.

69 services38 patients

Removal of cataract with insertion of prosthetic lens 66984

45 services27 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

39 services39 patients

Photography of the retina 92250

Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.

36 services36 patients

Removal of recurring cataract in lens capsule using a laser 66821

This procedure, known as YAG laser capsulotomy, treats cloudiness in the lens capsule following cataract surgery. A laser is used to create a small hole in the cloudy capsule, allowing light to pass through and restore clear vision. It's a quick, painless procedure.

29 services20 patients

New patient complete exam of visual system 92004

A new patient complete exam of the visual system is a thorough evaluation of your eyes and vision. It checks for any potential issues and assesses overall eye health. It includes tests for visual acuity, eye movement, and light response.

25 services25 patients

Exam of the internal drainage system of eye 92020

This is a procedure where your doctor examines the eye's internal drainage system, essential for maintaining eye pressure. They use specialized tools to check for blockages or damage that might lead to conditions like glaucoma. It's non-invasive and painless.

15 services15 patients

Ultrasound scan of cornea to determine thickness 76514

An ultrasound scan of the cornea is a non-invasive procedure that uses sound waves to measure the thickness of your cornea. This helps in diagnosing certain eye conditions and planning treatments. No discomfort or pain is typically experienced.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48439 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

$126.15 typical visit price

range $54.34 – $166.68

Typical copayment $31.53 (range $13.58 – $41.67)

Most-billed visit code 99204

Established Patient

$68.07 typical visit price

range $17.09 – $135.40

Typical copayment $17.01 (range $4.27 – $33.85)

Most-billed visit code 99213

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.

78.03/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

97.47

Promoting Interoperability

Improvement Activities

Cost

30.12

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.

ADVANCED ORTHOPEDIC SOLUTIONS, PC

Clinic/Center (Physical Therapy)

2240 E HILL RD, STE H
GRAND BLANC, MI 48439

Genesee County (810) 606-8766

JEFFREY SCOTT ROHR D.O.

Ophthalmology

2240 E HILL RD, D
GRAND BLANC, MI 48439

Genesee County (810) 579-0202

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 Charles Zenzen's NPI number?

The NPI number for Charles Zenzen is 1265448930. It was assigned to this individual provider in the NPPES registry on August 1, 2006.

Where is Charles Zenzen located?

Charles Zenzen practices at 2240 E Hill Rd, Grand Blanc, MI 48439. The listed phone number is (810) 579-0202.

What is Charles Zenzen's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Charles Zenzen enrolled in Medicare?

Yes. Charles Zenzen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Charles Zenzen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charles Zenzen reassigns Medicare benefits to Michigan Ophthalmology Specialists, PLLC (Livonia, MI). 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 Charles Zenzen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Charles Zenzen accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 3 other insurers list Charles Zenzen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Charles Zenzen was last updated on September 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.