Dr. William O. Hartzell, MD
- Medicare services, 2024
- 607
- Medicare patients, 2024
- 170
- Part D claims, 2024
- 1,074
- Hospital affiliations
- 1
- Industry payments
- $407
- Practice address
- 3650 Joseph Siewick Dr, Fairfax, VA 22033-1710
- Practice phone
- Call (703) 389-1027
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fairfax Lung Center
Physician office · Fairfax, Virginia
Find Dr. Hartzell's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William O. Hartzell is a pulmonologist in Fairfax, Virginia
Dr. Hartzell practices at Fairfax Lung Center in Fairfax, Virginia.
Dr. Hartzell's NPI, 1417938986, was assigned on November 10, 2005. Dr. Hartzell graduated from University of Virginia School of Medicine in 1992. Dr. Hartzell holds Virginia license 0101239857.
- NPI
- 1417938986NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830172188
- NPI enumeration date
- November 10, 2005
- NPI status
- Active
- Practice phone
- (703) 389-1027
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William O. Hartzell practices at Fairfax Lung Center in Fairfax, Virginia
Dr. Hartzell's primary practice is Fairfax Lung Center, at 3650 Joseph Siewick Dr, Fairfax, VA 22033-1710. The practice phone is (703) 389-1027.
- Fairfax Lung Center3650 Joseph Siewick Dr, Fairfax, VA 22033-1710Phone(703) 389-1027
Source: Dmand AI Affiliation Data
Dr. William O. Hartzell is affiliated with 2 sites of care
Dr. Hartzell's primary practice is Fairfax Lung Center in Fairfax, Virginia. Dr. Hartzell is also affiliated with Inova Fair Oaks Hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William O. Hartzell's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hartzell practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fairfax Lung Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William O. Hartzell is one of 339 pulmonologists in Virginia
Pulmonary disease is Dr. Hartzell's primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Hartzell is licensed in Virginia.
Specialties and state licenses
- Pulmonary disease, VirginiaPrimary
Pulmonologists near Dr. Hartzell
Counts of pulmonologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William O. Hartzell billed Medicare for 607 services in 2024
CMS data shows 607 Medicare services from Dr. Hartzell across 6 procedure codes in 2024, for 170 Medicare patients. Medicare paid $45,564 for them. Every service was in an office.
Dr. Hartzell's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4332024: 37214%
- Tests and treatments
- 2023: 1952024: 23521%
Dr. Hartzell compared with the Virginia median for pulmonologists, 2024
- Dr. Hartzell
- Virginia median
- Medicare services
- 607vs 74719% below
- Medicare patients
- 170vs 37455% below
- Part D claims
- 976vs 59065% above
Medians across 324 pulmonologists in Virginia with Dmand AI profiles that report each measure.
Dr. Hartzell's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William O. Hartzell treated 170 Medicare patients in 2024, average age 77
CMS counts 170 Medicare patients who saw Dr. Hartzell in 2024. The largest group is 65 to 74, with 70 patients. 75% of them have high cholesterol, and 73% have high blood pressure. Their average risk score is 1.36, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hartzell's median patient age at 70, with 47% women.
Dr. Hartzell's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hartzell's Medicare patients by sex, 2024
- Women8651%
- Men8449%
Chronic conditions among Dr. Hartzell's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- COPD53%
- Arthritis52%
- Asthma44%
- Ischemic heart disease34%
- Anxiety24%
- Chronic kidney disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hartzell's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women47%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William O. Hartzell wrote 1,074 Medicare Part D claims in 2024
In 2024, Dr. Hartzell wrote 1,074 Medicare Part D claims for 154 patients. 54% of them were for generic drugs. CMS names the drug for 976 of them, across 21 drugs with 11 or more claims each, at $654,124 in total drug cost. In 2023, CMS named 750 claims across 20 drugs.
Dr. Hartzell's Part D claims by kind of drug, 2024
- Generic580 claims54%
- Brand-name494 claims46%
Dr. Hartzell's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hartzell's Part D claims, 2024
- Antibiotics6%68 of 1,074 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7502024: 97630%
Drugs named by CMS: 21 in 2024, 20 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. William O. Hartzell received $407 in industry payments from 2018 to 2025
CMS Open Payments shows 15 general payments to Dr. Hartzell from 5 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 96% of the total. GlaxoSmithKline, LLC. paid the most, $154.
General payments to Dr. Hartzell by program year, 2018 to 2025
General payments to Dr. Hartzell by kind, 2018 to 2025
- Food and beverage$39196%
- Education$164%
Companies that paid Dr. Hartzell the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William O. Hartzell graduated from University of Virginia School of Medicine
Dr. Hartzell graduated from University of Virginia School of Medicine in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William O. Hartzell's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William O. Hartzell
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William O. Hartzell's NPI number?
Dr. William O. Hartzell's NPI number is 1417938986. It was assigned on November 10, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William O. Hartzell?
Dr. William O. Hartzell is a pulmonologist in Fairfax, Virginia. The primary specialty in the NPI Registry is Pulmonary Disease Physician (taxonomy code 207RP1001X).
Where does Dr. William O. Hartzell practice?
Dr. Hartzell practices at 3650 Joseph Siewick Dr, Fairfax, VA 22033-1710. Dr. Hartzell's primary practice is Fairfax Lung Center in Fairfax, Virginia.
What is Dr. William O. Hartzell's office phone number?
The practice phone on file for Dr. Hartzell is (703) 389-1027.
What is Dr. William O. Hartzell's medical license number?
Dr. Hartzell holds Virginia license 0101239857.
Which hospitals is Dr. William O. Hartzell affiliated with?
Dr. Hartzell is affiliated with Inova Fair Oaks Hospital.
Does Dr. William O. Hartzell accept Medicare?
Yes. CMS data shows Dr. Hartzell billed Medicare for 607 services in 2024.
How many Medicare patients does Dr. William O. Hartzell see?
CMS counts 170 Medicare patients who saw Dr. Hartzell in 2024, with an average age of 77.
What services does Dr. William O. Hartzell bill to Medicare?
In 2024, Dr. Hartzell's most billed Medicare services were office visit, established patient (99214), lung function service (94375) and office visit, new patient (99204).
Where did Dr. William O. Hartzell go to medical school?
Dr. Hartzell graduated from University of Virginia School of Medicine in 1992.
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What drugs does Dr. William O. Hartzell prescribe most?
In 2024 Medicare Part D data, Dr. Hartzell's most prescribed drugs by claims were Trelegy Ellipta, Montelukast Sodium and Prednisone.
Has Dr. William O. Hartzell received payments from drug or device companies?
CMS Open Payments shows $407 in general payments to Dr. Hartzell from 5 companies from 2018 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. William O. Hartzell been practicing?
Dr. Hartzell graduated from medical school in 1992, 34 years ago.
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