Anna K. Callahan

NP·Nurse Practitioner

11531 W EMERALD OAKS DR, Crystal River, FL 34428

Medicare Accepted

Telehealth Available

1+ Years Experience

Contact Anna K. Callahan

(352) 431-3940 Get Directions

11531 W EMERALD OAKS DR, Crystal River, FL 34428

For Providers

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Specialty

Nurse Practitioner Specialists

Coverage

Medicare + 2 Networks

Telehealth

Available

HPSA Shortage AreaScore: 16/25 • Mental Health

About Anna K. Callahan

Background and practice information

Anna K. Callahan is a nurse practitioner with over 1 years of clinical experience serving patients in the Crystal River, FL area. She completed her medical training at Other and has been in practice since 2025. She currently practices at Harmony United Healthcare Llc.

Anna K. Callahan's clinical practice focuses on treating patients with bacterial infections and acne.

Anna K. Callahan is in-network with 2 insurance providers, including Aetna, Humana. Patients are encouraged to verify coverage with her office before scheduling an appointment.

At a Glance

GenderFemale

Experience1+ years

MedicareAccepted

TelehealthAvailable

Education

Medical SchoolOther

Graduated2025

Are you Anna K. Callahan?

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Practice Locations

1 location

Harmony United Healthcare Llc

Primary

11531 W Emerald Oaks Dr

Crystal River, FL 34428

(352) 431-3940

Affiliations

Hospital and facility affiliations

Harmony United Healthcare Llc

Group Practice · CRYSTAL RIVER, FL

Treatment & Experience

Clinical practice and procedure experience for Anna K. Callahan

Treatment Approach

Anna K. Callahan's treatment approach includes prescribing Doxycycline Hyclate for her patients. These medications are commonly used for treating bacterial infections and acne.

Doxycycline Hyclate— for bacterial infections and acne

Source: CMS Medicare Provider Utilization and Payment Data, 2023.

Insurance Networks

Accepted insurance plans and networks

Anna K. Callahan accepts 20 plans from 2 insurers, including Aetna, Humana.

Aetna

In-NetworkView all Aetna doctors in Crystal River, FL →

Aetna Choice POS IIPOS

Aetna CVS Silver

Aetna HMOHMO

Aetna Open Access Elect ChoiceOAP

Aetna Open Access Health Network OnlyOAP

AHF PPOPPO

Open Access Aetna Health Network OnlyOAP

Open Access Aetna SelectOAP

Open Access Elect ChoiceOAP

Open ChoicePPO

Source: CMS Transparency in Coverage filings (March 2026). Network participation may change — verify with the provider's office before scheduling.

Patient Reviews

Reviews and ratings from patients

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This profile appears in 2 insurance networks

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About Nurse Practitioner

Specialty overview and common conditions

A Nurse Practitioner (NP) is an advanced practice registered nurse who provides comprehensive healthcare services including diagnosing illnesses, prescribing medications, ordering and interpreting diagnostic tests, and developing treatment plans. NPs practice in various specialties including primary...

Common conditions treated by nurse practitioner specialists:

Diabetes Management
Hypertension (High Blood Pressure)
Respiratory Infections
Anxiety and Depression

Learn more about nurse practitioner specialists

Frequently Asked Questions

Common questions about Anna K. Callahan

Does Callahan accept Medicare?

Yes, Callahan accepts Medicare assignment. Patients with Medicare coverage can see Callahan and typically pay less out of pocket when using a provider who accepts Medicare assignment.

What insurance does Callahan accept?

Callahan is in-network with 2 insurance providers, including Aetna, Humana. Insurance networks can change, so patients should verify their specific plan coverage directly with Callahan's office before scheduling.

Does Callahan offer telehealth or virtual appointments?

Yes, Callahan offers telehealth services, allowing patients to have virtual consultations from the comfort of their home. Contact the office to schedule a telehealth appointment.

What conditions does Callahan treat?

As a nurse practitioner specialist, Callahan commonly treats conditions including diabetes management, hypertension (high blood pressure), respiratory infections, anxiety and depression, women's health issues, and other related health concerns. Contact the office to discuss your specific healthcare needs.

What medications does Callahan commonly prescribe?

Based on Medicare prescribing data, Callahan commonly prescribes medications including Doxycycline Hyclate. The specific medications prescribed depend on each patient's individual diagnosis and health needs. Patients should discuss treatment options directly with Callahan during their consultation.

Where did Callahan go to medical school?

Callahan completed medical training at Other and has been practicing since 2025, bringing over 1 years of clinical experience.

Where is Callahan's office located?

Callahan practices at 11531 W EMERALD OAKS DR, Crystal River, FL 34428 at HARMONY UNITED HEALTHCARE LLC. You can reach the office by calling (352) 431-3940.

How do I make an appointment with Callahan?

To schedule an appointment with Callahan, call the office at (352) 431-3940. New patients should have their insurance information and medical records ready when calling.

Data source: CMS National Provider Registry · Last updated: May 2026