Douglas Isenstein, MD
NPI 1528148400 · Pulmonary Disease Physician · Snellville, GA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Isenstein, MD is a Pulmonary Disease Physician provider in Snellville, GA (NPI 1528148400).
Provider details
- NPI number
- 1528148400
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 025770 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
807 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 | 251 | $125 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 176 | $115 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 100 | $90 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 49 | $165 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 46 | $167 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 386 | 82 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 236 | 88 |
| Montelukast Sodium | 87 | 26 |
| Prednisone | 84 | 44 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 69 | 21 |
| Azithromycin | 68 | 48 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$435 across 20 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
- 2006-10-16
- Last updated
- 2020-10-15
- Certified
- 2020-10-15
Frequently asked questions
- What is Douglas Isenstein's NPI number?
- Douglas Isenstein's National Provider Identifier (NPI) is 1528148400, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Isenstein's specialty?
- Douglas Isenstein is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Isenstein located?
- Douglas Isenstein's practice location on file with NPPES is 1800 Tree Lane Road, Snellville, GA 30078.
- What is Douglas Isenstein's phone number?
- The practice phone number listed in the NPPES registry for Douglas Isenstein is (770) 979-0367.
- Does Douglas Isenstein accept Medicare?
- Douglas Isenstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Isenstein's NPI active?
- Yes — Douglas Isenstein's NPI (1528148400) is active in the NPPES registry as of the last update on 2020-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.