Internal Medicine, Pulmonary Disease · Fullerton, CA
NPI
1649266032
Since 2005
Specialty
Internal Medicine, Pulmonary Disease
Code 207RP1001X
Group practices
1
Medicare group memberships
Hospitals
2
Hospital affiliations
2141 N Harbor Blvd, Suite 25000
Fullerton, CA, 92835
Phone (714) 626-8610
Groups this clinician bills Medicare through
Medicare paid, 2024
$122K
1,616 services
Medicare patients, 2024
529
Average age 77
Drug cost, 2024
$1.7M
5,274 prescriptions
Company payments, 2025
$424
From 3 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Mark D Weissig was code 99213 (office e&m - established), 775 times for 404 patients. In total Mark D Weissig billed 1,616 services in 18 codes, and Medicare paid $122K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2013-04-25.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99213 Office E&M - Established | Office | 775 | 404 | $71.20 | $55K |
| 99214 Office E&M - Established | Office | 352 | 227 | $100.47 | $35K |
| 94060 Pulmonary Function Testing | Office | 136 | 133 | $34.45 | $4,685 |
| 94729 Pulmonary Function Testing | Office | 102 | 101 | $50.43 | $5,144 |
| 94726 Pulmonary Function Testing | Office | 101 | 100 | $49.76 | $5,026 |
| 99205 Office E&M - New | Office | 89 | 89 | $164.60 | $15K |
By year: 2022 $141K for 1,784 services; 2023 $126K for 1,708 services; 2024 $122K for 1,616 services.
Lab tests billed to Medicare, 2023
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 37 | 29 | $8.40 | $311 |
Medicare prescription drug claims, 2024
In 2024, the drug Mark D Weissig prescribed most often to Medicare patients was Trelegy Ellipta (Fluticasone/Umeclidin/Vilanter), with 439 prescriptions and refills. In total Mark D Weissig wrote 5,274 Medicare prescriptions that cost $1.7M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 439 | 655 | 112 | $404K |
| Albuterol Sulfate Hfa Albuterol Sulfate | 310 | 350 | 140 | $7,702 |
| Prednisone Generic | 299 | 329 | 104 | $1,057 |
| Breztri Aerosphere Budesonide/Glycopyr/Formoterol | 268 | 377 | 76 | $225K |
| Montelukast Sodium Generic | 262 | 725 | 73 | $3,338 |
| Furosemide Generic | 237 | 521 | 78 | $1,192 |
| Losartan Potassium Generic | 182 | 454 | 56 | $1,935 |
| Breo Ellipta Fluticasone/Vilanterol | 176 | 303 | 50 | $114K |
| Amlodipine Besylate Generic | 164 | 446 | 53 | $1,140 |
| Azithromycin Generic | 132 | 147 | 75 | $759 |
| Rosuvastatin Calcium Generic | 116 | 271 | 32 | $1,727 |
| Wixela Inhub Fluticasone Propion/Salmeterol | 113 | 192 | 43 | $19K |
| Doxycycline Hyclate Generic | 105 | 105 | 50 | $801 |
| Levothyroxine Sodium Generic | 103 | 246 | 30 | $1,017 |
| Spiriva Respimat Tiotropium Bromide | 101 | 187 | 32 | $93K |
Brand drugs: - claims; generic drugs: 3,308 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Mark D Weissig $424 ($424 in general payments such as food, travel and fees) from 3 companies. The largest payer was AstraZeneca Pharmaceuticals LP with $193.
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.