Darren Hammergren, NP
NPI 1386669885 · Psychiatric/Mental Health Nurse Practitioner · Tucson, AZ
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Darren Hammergren, NP is a Psychiatric/Mental Health Nurse Practitioner provider in Tucson, AZ (NPI 1386669885).
Provider details
- NPI number
- 1386669885
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- Yes
- License
- RN108557 (AZ)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
313 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 129 | $102 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 90 | $74 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 59 | $102 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 35 | $58 |
Typical Medicare-allowed amounts for these services range $58–$102 (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 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 101 | 28 |
| Lamotrigine | 94 | 23 |
| Lorazepam | 86 | 14 |
| Desvenlafaxine Succinatebrand: Desvenlafaxine Succinate Er | 73 | 16 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 69 | 12 |
| Clonazepam | 68 | 16 |
| Bupropion Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$797 across 42 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-13
- Last updated
- 2021-10-25
- Certified
- 2021-10-25
Frequently asked questions
- What is Darren Hammergren's NPI number?
- Darren Hammergren's National Provider Identifier (NPI) is 1386669885, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Darren Hammergren's specialty?
- Darren Hammergren is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Darren Hammergren located?
- Darren Hammergren's practice location on file with NPPES is 5920 E Pima St Ste 140, Tucson, AZ 85712-4380.
- What is Darren Hammergren's phone number?
- The practice phone number listed in the NPPES registry for Darren Hammergren is (520) 747-2861.
- Does Darren Hammergren accept Medicare?
- Darren Hammergren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Darren Hammergren's NPI active?
- Yes — Darren Hammergren's NPI (1386669885) is active in the NPPES registry as of the last update on 2021-10-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.