DR. CHARLES DEREK COHN M.D.
NPI 1003044058
Ophthalmology in Fredericksburg, TX

Q: What is Charles Cohn's NPI number?

The NPI number for Charles Cohn is 1003044058. It was assigned to this individual provider in the NPPES registry on June 29, 2009.

Q: What is Charles Cohn'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 Cohn was last updated on January 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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 June 29, 2009PECOS EnrolledAccepts Medicare Assignment

81.66/100

CMS Quality Rating

751 S WASHINGTON ST, FREDERICKSBURG, TX 78624(830) 997-6535(830) 997-9695 Get Directions Write a Review

NPPES record last updated: January 24, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Charles Derek Cohn M.d. NPPES

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

DR. CHARLES DEREK COHN M.D. (NPI 1003044058) is an individual ophthalmology provider in Fredericksburg, Texas, licensed in Texas (P0187) and active in the NPI registry since June 2009. He is enrolled in Medicare PECOS, is affiliated with Hill Country Memorial Hospital, and is a graduate of University Of Texas Medical Branch At Galveston (2009).

NPPES Registry Identity

NPI1003044058

Entity TypeIndividualMale

Primary Taxonomy207W00000X

Provider Legal NameDR. CHARLES DEREK COHNCredential: M.D.

Location Address751 S WASHINGTON STFredericksburg, TX 78624-5022

Mailing Address751 S Washington StFredericksburg, TX 78624-5022 · (830) 997-6535 · Fax (830) 997-9695

Phone(830) 997-6535

Fax(830) 997-9695

Sole ProprietorNo

Medical School CMSUniversity Of Texas Medical Branch At GalvestonGraduated 2009

Enumeration DateJune 29, 2009

Last NPPES UpdateJanuary 24, 2026

NPPES CertifiedJanuary 24, 2026

✔ NPI 1003044058 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians

Taxonomy Code207W00000X

License✔ Licensed in TX · P0187

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.

751 S WASHINGTON ST, Fredericksburg, TX 78624

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Charles Derek Cohn M.d. 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 ID1951554385

PECOS Enrollment IDI20130114000334

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.

Areas of Expertise CMS Part B claims 22

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 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.

1,276 services1,240 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.

740 services527 patients

Established patient problem focused exam of visual system 92012

This is a routine check-up for existing patients focusing on the visual system. It involves examining your eyes to detect any potential issues or changes in your vision. It's a crucial part of maintaining good eye health.

419 services335 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).

367 services357 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.

237 services144 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.

225 services131 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.

177 services175 patients

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.

176 services169 patients

Injection of drug into eye 67028

An injection into the eye is a procedure where a medication is delivered directly into your eye to treat various conditions. A local anesthetic is applied to numb the eye, ensuring minimal discomfort. The drug helps manage diseases like macular degeneration or diabetic retinopathy.

169 services32 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.

163 services163 patients

Injection, aflibercept, 1 mg J0178

Aflibercept injection is a treatment for certain eye conditions that affect vision. It works by blocking abnormal blood vessel growth and leakage in the eye, which can cause vision loss. The medication is administered directly into the eye by a healthcare professional.

146 services13 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.

126 services119 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.

104 services92 patients

Laser repair to improve eye fluid flow 65855

Laser repair to improve eye fluid flow is a procedure aimed at treating glaucoma. A laser is used to create a small hole in the eye's drainage system, allowing fluid to flow out more easily. This helps to lower the pressure inside the eye, reducing the risk of vision loss.

55 services32 patients

Injection, bevacizumab, 10 mg J9035

Bevacizumab is a medication given through an injection. It's designed to prevent the growth of new blood vessels that cancer cells need to grow and spread. The 10 mg dose refers to the amount of the drug in the injection.

40 services11 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.

39 services39 patients

Compounded drug, not otherwise classified J7999

A compounded drug is a personalized medication created to meet unique patient needs. If you can't take standard drugs due to allergies or need a specific dosage not commercially available, a pharmacist can mix ingredients to make a drug specifically for you.

32 services14 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.

31 services31 patients

Incision to improve eye fluid flow 65820

This procedure, known as a trabeculectomy, involves creating a small opening in the eye to improve fluid flow. This can help lower eye pressure in conditions like glaucoma. It's a common, safe procedure to protect your eye health.

26 services14 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.

24 services24 patients

New patient problem focused exam of visual system 92002

A new patient problem-focused exam of the visual system is a basic evaluation of your eyes and vision. It includes checking your eye movements, visual acuity, and general eye health. It helps detect any potential issues early for timely treatment.

15 services15 patients

Imaging of front third of eye 92132

Imaging of the front third of the eye, also known as anterior segment imaging, captures detailed images of the eye's front part. This includes the iris, cornea, and lens. It's a non-invasive procedure that helps diagnose and monitor eye conditions.

14 services14 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Hill Country Memorial Hospital

Acute Care Hospitals · Fredericksburg, TX

5/5 CMS rating

OwnershipProprietary

CMS Certification Number450604

Location1020 South State Highway 16Fredericksburg, TX 78624 · Gillespie County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78624 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

$126.40 typical visit price

range $54.84 – $166.88

Typical copayment $31.60 (range $13.71 – $41.72)

Most-billed visit code 99204

Established Patient

$68.55 typical visit price

range $17.52 – $136.11

Typical copayment $17.13 (range $4.38 – $34.02)

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.

81.66/100

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

Scored as part of a group practice

Quality

100

Improvement Activities

Cost

38.88

Reported Quality Measures

Age-Related Macular Degeneration (AMD): Counseling on Antioxidant Supplement

Percentage of patients aged 50 years and older with a diagnosis of age-related macular degeneration (AMD) or their caregiver(s) who were counseled within 12 months on the benefits and/or risks of the Age-Related Eye Disease Study (AREDS) formulation for…

94%236 patients4/55-star benchmark: 100%

Age-Related Macular Degeneration (AMD): Dilated Macular Examination

Percentage of patients aged 50 years and older with a diagnosis of age-related macular degeneration (AMD) who had a dilated macular examination performed which included documentation of the presence or absence of macular thickening or geographic atrophy or…

90%236 patients4/55-star benchmark: 100%

Cataracts: 20/40 or Better Visual Acuity within 90 Days Following Cataract Surgery

Percentage of patients aged 18 years and older with a diagnosis of uncomplicated cataract who had cataract surgery and no significant ocular conditions impacting the visual outcome of surgery and had best-corrected visual acuity of 20/40 or better (distance…

93%160 patients

Diabetes: Eye Exam

Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period

99%105 patients4/55-star benchmark: 100%

Diabetic Retinopathy: Communication with the Physician Managing Ongoing Diabetes Care

Percentage of patients aged 18 years and older with a diagnosis of diabetic retinopathy who had a dilated macular or fundus exam performed with documented communication to the physician who manages the ongoing care of the patient with diabetes mellitus…

27%26 patients2/55-star benchmark: 100%

Diabetic Retinopathy: Documentation of Presence or Absence of Macular Edema and Level of Severity of Retinopathy

Percentage of patients aged 18 years and older with a diagnosis of diabetic retinopathy who had a dilated macular or fundus exam performed which included documentation of the level of severity of retinopathy and the presence or absence of macular edema during…

97%35 patients4/55-star benchmark: 100%

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

86%3,022 patients3/55-star benchmark: 100%

e-Prescribing

At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.

98%295 patients4/55-star benchmark: 100%

Health Information Exchange

The MIPS eligible clinician that transitions or refers their patient to another setting of care or health care clinician (1) uses CEHRT to create a summary of care record; and (2) electronically transmits such summary to a receiving health care clinician for…

48%955 patients2/55-star benchmark: 98%

Pneumococcal Vaccination Status for Older Adults

Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine

1%175 patients1/55-star benchmark: 90%

Primary Open-Angle Glaucoma (POAG): Optic Nerve Evaluation

Percentage of patients aged 18 years and older with a diagnosis of primary open-angle glaucoma (POAG) who have an optic nerve head evaluation during one or more office visits within 12 months

78%254 patients3/55-star benchmark: 100%

Provide Patient Access

At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…

96%1,934 patients4/55-star benchmark: 100%

Secure Messaging

For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…

0%1,934 patients1/55-star benchmark: 79%

Use of High-Risk Medications in the Elderly

Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.

Lower rates are better for this measure.

Patients 2+: 0% · 1,239 patients

0%1,239 patients5/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 4

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

FREDERICKSBURG EYE ASSOCIATES, PLLC

Ophthalmology

751 S WASHINGTON ST
FREDERICKSBURG, TX 78624

Gillespie County (830) 997-6535

TEXAS OCULOPLASTIC CONSULTANTS LLP

Ophthalmology (Ophthalmic Plastic and Reconstructive Surgery)

751 S WASHINGTON ST
FREDERICKSBURG, TX 78624

Gillespie County (866) 862-3027

DR. GIOVANNI ANTONIO CAMPAGNA II MD

Ophthalmology (Glaucoma Specialist)

751 S WASHINGTON ST
FREDERICKSBURG, TX 78624

Gillespie County (830) 997-6535

ANNE C PLUENNEKE MD

Ophthalmology

751 S WASHINGTON ST
FREDERICKSBURG, TX 78624

Gillespie County (830) 997-6535

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 Cohn's NPI number?

The NPI number for Charles Cohn is 1003044058. It was assigned to this individual provider in the NPPES registry on June 29, 2009.

Where is Charles Cohn located?

Charles Cohn practices at 751 S Washington St, Fredericksburg, TX 78624. The listed phone number is (830) 997-6535.

What is Charles Cohn's specialty?

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

Is Charles Cohn enrolled in Medicare?

Yes. Charles Cohn 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.

What insurance does Charles Cohn accept?

Health plans from Blue Cross and Blue Shield of Texas list Charles Cohn 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.

Is Charles Cohn affiliated with any hospitals?

According to CMS data, Charles Cohn is affiliated with Hill Country Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Charles Cohn was last updated on January 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.