Colleen Karkhang, CNP
NPI 1730545187 · Gerontology Nurse Practitioner · New Haven, CT
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colleen Karkhang, CNP is a Gerontology Nurse Practitioner provider in New Haven, CT (NPI 1730545187).
Provider details
- NPI number
- 1730545187
- Entity type
- Individual
- Primary specialty
- Gerontology Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 8271 (CT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
11 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 .
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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 11 | $125 |
Typical Medicare-allowed amounts for these services range $125–$125 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 41 | — |
| Famotidine | 40 | — |
| Amlodipine Besylate | 25 | 12 |
| Carvedilol | 22 | — |
| Valganciclovir Hcl | 17 | — |
| Atorvastatin Calcium | 16 | — |
| Omeprazole | 14 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$75 across 1 record (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.
Practice location
Mailing address
Additional practice locations (1)
- 3219 Clifton AveSuite 315Cincinnati, OH 45220-3027Phone: (513) 624-0999
Registry dates
- Enumerated
- 2016-01-14
- Last updated
- 2019-10-18
Frequently asked questions
- What is Colleen Karkhang's NPI number?
- Colleen Karkhang's National Provider Identifier (NPI) is 1730545187, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colleen Karkhang's specialty?
- Colleen Karkhang is listed in the NPPES registry with a primary specialty of Gerontology Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Colleen Karkhang located?
- Colleen Karkhang's practice location on file with NPPES is 20 York St, New Haven, CT 06510.
- What is Colleen Karkhang's phone number?
- The practice phone number listed in the NPPES registry for Colleen Karkhang is (475) 355-0785.
- Does Colleen Karkhang accept Medicare?
- Colleen Karkhang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colleen Karkhang's NPI active?
- Yes — Colleen Karkhang's NPI (1730545187) is active in the NPPES registry as of the last update on 2019-10-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.