What is Charles Mcmahon's NPI number?

Charles Mcmahon's National Provider Identifier (NPI) is 1639168735, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Charles Mcmahon's specialty?

Charles Mcmahon is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).

Where is Charles Mcmahon located?

Charles Mcmahon's practice location on file with NPPES is 3245 International Cir Ste 102, Colorado Springs, CO 80910-3152.

What is Charles Mcmahon's phone number?

The practice phone number listed in the NPPES registry for Charles Mcmahon is (719) 633-8000.

Does Charles Mcmahon accept Medicare?

Charles Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Charles Mcmahon's NPI active?

Yes — Charles Mcmahon's NPI (1639168735) is active in the NPPES registry as of the last update on 2022-07-21.

IndividualActiveAccepts Medicare

Charles Mcmahon, M.D.

NPI 1639168735 · Ophthalmology Physician · Colorado Springs, CO

Charles Mcmahon, M.D. is a Ophthalmology Physician provider in Colorado Springs, CO (NPI 1639168735).

Provider details

NPI number: 1639168735
Entity type: Individual
Primary specialty: Ophthalmology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: No
License: DR.0018837 (CO)

Practice location

3245 International Cir Ste 102

Colorado Springs, CO 80910-3152

Phone: (719) 633-8000

Fax: (719) 434-8855

Street-level locationGet directions

More CO providers

Mailing address

Po Box 280

Colorado Springs, CO 80901-0280

Specialties & taxonomies

Ophthalmology PhysicianPrimary207W00000XLicense DR.0018837 (CO)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Established profile(72/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
21 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
1 documented practice location
Medicare service volume (vs. specialty peers)25% of score
521 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	221	$129
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	107	$91
Imaging of Retina92134	61	$41
Photography of the Retina92250	47	$37
Imaging of Optic Nerve92133	41	$37
Removal of Recurring Cataract in Lens Capsule Using a Laser66821	18	$336

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Brimonidine Tartrate	215	98
Latanoprost	69	17
Prednisolone Acetate	36	23
Dorzolamide Hcl	35	12
Bimatoprostbrand: Lumigan	34	11
Netarsudil Mesylat/Latanoprostbrand: Rocklatan	22	—
Gabapentin	17	—

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$44 across 2 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Enumerated: 2005-10-20
Last updated: 2022-07-21

Frequently asked questions

What is Charles Mcmahon's NPI number?: Charles Mcmahon's National Provider Identifier (NPI) is 1639168735, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Charles Mcmahon's specialty?: Charles Mcmahon is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
Where is Charles Mcmahon located?: Charles Mcmahon's practice location on file with NPPES is 3245 International Cir Ste 102, Colorado Springs, CO 80910-3152.
What is Charles Mcmahon's phone number?: The practice phone number listed in the NPPES registry for Charles Mcmahon is (719) 633-8000.
Does Charles Mcmahon accept Medicare?: Charles Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Charles Mcmahon's NPI active?: Yes — Charles Mcmahon's NPI (1639168735) is active in the NPPES registry as of the last update on 2022-07-21.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	221	$129
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	107	$91
Imaging of Retina92134	61	$41
Photography of the Retina92250	47	$37
Imaging of Optic Nerve92133	41	$37
Removal of Recurring Cataract in Lens Capsule Using a Laser66821	18	$336

Drug

Part D claims (2024)

Beneficiaries

Brimonidine Tartrate

215

Latanoprost

Prednisolone Acetate

Dorzolamide Hcl

Bimatoprostbrand: Lumigan

Netarsudil Mesylat/Latanoprostbrand: Rocklatan

—

Gabapentin

—

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$44 across 2 records (Open Payments 2024)

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments